diff --git a/.env.sample b/.env.sample
index 30c9381..9d27103 100644
--- a/.env.sample
+++ b/.env.sample
@@ -1,4 +1,5 @@
 PRESENTATION_STORAGE=local
+MAX_FILE_SIZE_MB=15
 
 AWS_ACCESS_KEY_ID=xxx
 AWS_SECRET_ACCESS_KEY=xxx
diff --git a/CHANGELOG.md b/CHANGELOG.md
index bd95162..22aa34d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@
 - Migrate to Liveview 0.18
 - Add multiple choice poll
 - Add feature to import all interactions from another presentation
+- Add MAX_FILE_SIZE_MB environment variable to limit file upload size
+- Add feature to deactivate messages during a presentation
 
 
 ## v1.3.0
diff --git a/assets/js/app.js b/assets/js/app.js
index b1bcd54..7b638a7 100644
--- a/assets/js/app.js
+++ b/assets/js/app.js
@@ -148,8 +148,10 @@ Hooks.PostForm = {
   mounted() {
     const submitBtn = document.getElementById("submitBtn")
     const TA = document.getElementById("postFormTA")
-    submitBtn.addEventListener("click", (e) => this.onSubmit(e, TA))
-    TA.addEventListener("keydown",  (e) => this.onPress(e, submitBtn, TA))
+    if (submitBtn && TA) {
+      submitBtn.addEventListener("click", (e) => this.onSubmit(e, TA))
+      TA.addEventListener("keydown",  (e) => this.onPress(e, submitBtn, TA))  
+    }
   },
   updated() {
     const submitBtn = document.getElementById("submitBtn")
@@ -165,8 +167,10 @@ Hooks.PostForm = {
   destroyed() {
     const submitBtn = document.getElementById("submitBtn")
     const TA = document.getElementById("postFormTA")
-    TA.removeEventListener("keydown",  (e) => this.onPress(e, submitBtn, TA))
-    submitBtn.removeEventListener("click",  (e) => this.onSubmit(e, TA))
+    if (submitBtn && TA) {
+      TA.removeEventListener("keydown",  (e) => this.onPress(e, submitBtn, TA))
+      submitBtn.removeEventListener("click",  (e) => this.onSubmit(e, TA))  
+    }
   }
 }
 
diff --git a/config/config.exs b/config/config.exs
index 317f58e..c9148e6 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -66,6 +66,9 @@ config :ex_aws,
   region: {:system, "AWS_REGION"},
   normalize_path: false
 
+config :claper, max_file_size: System.get_env("MAX_FILE_SIZE_MB") || 15
+
+
 # Import environment specific config. This must remain at the bottom
 # of this file so it overrides the configuration defined above.
 import_config "#{config_env()}.exs"
diff --git a/config/runtime.exs b/config/runtime.exs
index b187ab6..1606636 100644
--- a/config/runtime.exs
+++ b/config/runtime.exs
@@ -76,6 +76,8 @@ if config_env() == :prod do
   # Swoosh supports Hackney and Finch out of the box:
   #
 
+
+
   if System.get_env("MAIL_TRANSPORT", "local") == "smtp" do
     config :claper, Claper.Mailer,
       adapter: Swoosh.Adapters.SMTP,
diff --git a/guides/introduction/configuration.md b/guides/introduction/configuration.md
index b35ba91..cca6573 100644
--- a/guides/introduction/configuration.md
+++ b/guides/introduction/configuration.md
@@ -37,6 +37,7 @@ MAILBOX_PASSWORD | - | - | - | Basic auth password for mailbox route
 Variable | Values | Default | Required | Description
 --- | --- | --- | --- | ---
 ENABLE_ACCOUNT_CREATION | true, false | true | - | Enable/disable user registration
+MAX_FILE_SIZE_MB | - | 15 | - | Max file size to upload in MB
 
 ## Production / Docker
 
diff --git a/guides/usage/features.md b/guides/usage/features.md
index a512f12..f748a4d 100644
--- a/guides/usage/features.md
+++ b/guides/usage/features.md
@@ -18,6 +18,8 @@ When you create a new presentation, click on **Present/Customize**, select the s
 
 During your presentation, enable **Active poll results** on the dashboard to see the poll results in real time.
 
+You can choose between single choice and multiple choice polls.
+
 <img src="assets/feature1.png" width="300"/>
 
 ## Forms
diff --git a/lib/claper/presentations/presentation_state.ex b/lib/claper/presentations/presentation_state.ex
index 4e16779..a0d539c 100644
--- a/lib/claper/presentations/presentation_state.ex
+++ b/lib/claper/presentations/presentation_state.ex
@@ -7,6 +7,7 @@ defmodule Claper.Presentations.PresentationState do
     field :chat_visible, :boolean
     field :poll_visible, :boolean
     field :join_screen_visible, :boolean
+    field :chat_enabled, :boolean
     field :banned, {:array, :string}, default: []
 
     belongs_to :presentation_file, Claper.Presentations.PresentationFile
@@ -23,7 +24,8 @@ defmodule Claper.Presentations.PresentationState do
       :poll_visible,
       :join_screen_visible,
       :banned,
-      :presentation_file_id
+      :presentation_file_id,
+      :chat_enabled
     ])
     |> validate_required([])
   end
diff --git a/lib/claper_web/live/event_live/event_form_component.ex b/lib/claper_web/live/event_live/event_form_component.ex
index 2442ab1..1d2f378 100644
--- a/lib/claper_web/live/event_live/event_form_component.ex
+++ b/lib/claper_web/live/event_live/event_form_component.ex
@@ -7,15 +7,18 @@ defmodule ClaperWeb.EventLive.EventFormComponent do
   def update(%{event: event} = assigns, socket) do
     changeset = Events.change_event(event)
 
+    {max_file_size, _} = Integer.parse("#{Application.fetch_env!(:claper, :max_file_size)}")
+
     {:ok,
      socket
      |> assign(assigns)
      |> assign(:changeset, changeset)
+     |> assign(:max_file_size, max_file_size)
      |> allow_upload(:presentation_file,
        accept: ~w(.pdf .ppt .pptx),
        auto_upload: true,
        max_entries: 1,
-       max_file_size: 15_000_000
+       max_file_size: max_file_size * 1_000_000 # MB
      )}
   end
 
diff --git a/lib/claper_web/live/event_live/event_form_component.html.heex b/lib/claper_web/live/event_live/event_form_component.html.heex
index 26d3ea2..a20e622 100644
--- a/lib/claper_web/live/event_live/event_form_component.html.heex
+++ b/lib/claper_web/live/event_live/event_form_component.html.heex
@@ -75,7 +75,7 @@
               </label>
               <p class="pl-1"><%= gettext("or drag and drop") %></p>
             </div>
-            <p class="text-xs text-gray-500"><%= gettext("PDF, PPT, PPTX up to 15MB") %></p>
+            <p class="text-xs text-gray-500"><%= gettext("PDF, PPT, PPTX up to %{size} MB", size: @max_file_size) %></p>
             <%= for entry <- @uploads.presentation_file.entries do %>
               <progress id="file" max="100" value={entry.progress}>
                 <%= entry.progress %>
diff --git a/lib/claper_web/live/event_live/manage.ex b/lib/claper_web/live/event_live/manage.ex
index 92e480d..839d97c 100644
--- a/lib/claper_web/live/event_live/manage.ex
+++ b/lib/claper_web/live/event_live/manage.ex
@@ -297,6 +297,23 @@ defmodule ClaperWeb.EventLive.Manage do
     {:noreply, socket |> assign(:state, new_state)}
   end
 
+  @impl true
+  def handle_event(
+        "checked",
+        %{"key" => "chat_enabled", "value" => value},
+        %{assigns: %{state: state}} = socket
+      ) do
+    {:ok, new_state} =
+      Claper.Presentations.update_presentation_state(
+        state,
+        %{
+          :chat_enabled => value
+        }
+      )
+
+    {:noreply, socket |> assign(:state, new_state)}
+  end
+
   @impl true
   def handle_event(
         "checked",
diff --git a/lib/claper_web/live/event_live/manage.html.heex b/lib/claper_web/live/event_live/manage.html.heex
index 16009ec..1cea4bc 100644
--- a/lib/claper_web/live/event_live/manage.html.heex
+++ b/lib/claper_web/live/event_live/manage.html.heex
@@ -759,29 +759,43 @@
       </div>
 
       <div class="w-full shadow-lg">
-        <div class="px-5 py-3">
-          <span class="font-semibold text-lg"><%= gettext("On screen settings") %></span>
+        <div class="px-5 py-3 grid grid-cols-1 sm:grid-cols-2">
+          <div>
+            <span class="font-semibold text-lg"><%= gettext("On screen settings") %></span>
 
-          <div class="flex space-x-2 items-center mt-3">
-            <ClaperWeb.Component.Input.check
-              key={:join_screen_visible}
-              checked={@state.join_screen_visible}
-            />
-            <span><%= gettext("Instructions") %></span>
+            <div class="flex space-x-2 items-center mt-3">
+              <ClaperWeb.Component.Input.check
+                key={:join_screen_visible}
+                checked={@state.join_screen_visible}
+              />
+              <span><%= gettext("Show instructions") %></span>
+            </div>
+
+            <div class="flex space-x-2 items-center mt-3">
+              <ClaperWeb.Component.Input.check key={:chat_visible} checked={@state.chat_visible} />
+              <span><%= gettext("Show messages") %></span>
+            </div>
+
+            <div class={"#{if !@current_poll, do: 'opacity-50'} flex space-x-2 items-center mt-3"}>
+              <ClaperWeb.Component.Input.check
+                key={:poll_visible}
+                disabled={!@current_poll}
+                checked={@state.poll_visible}
+              />
+              <span><%= gettext("Show poll results") %></span>
+            </div>
           </div>
 
-          <div class="flex space-x-2 items-center mt-3">
-            <ClaperWeb.Component.Input.check key={:chat_visible} checked={@state.chat_visible} />
-            <span><%= gettext("Messages") %></span>
-          </div>
+          <div>
+            <span class="font-semibold text-lg"><%= gettext("Attendees settings") %></span>
 
-          <div class={"#{if !@current_poll, do: 'opacity-50'} flex space-x-2 items-center mt-3"}>
-            <ClaperWeb.Component.Input.check
-              key={:poll_visible}
-              disabled={!@current_poll}
-              checked={@state.poll_visible}
-            />
-            <span><%= gettext("Active poll results") %></span>
+            <div class="flex space-x-2 items-center mt-3">
+              <ClaperWeb.Component.Input.check
+                key={:chat_enabled}
+                checked={@state.chat_enabled}
+              />
+              <span><%= gettext("Enable messages") %></span>
+            </div>
           </div>
         </div>
       </div>
diff --git a/lib/claper_web/live/event_live/show.ex b/lib/claper_web/live/event_live/show.ex
index a463ba9..d9551b8 100644
--- a/lib/claper_web/live/event_live/show.ex
+++ b/lib/claper_web/live/event_live/show.ex
@@ -54,6 +54,7 @@ defmodule ClaperWeb.EventLive.Show do
   defp init(socket, event, false) do
     if connected?(socket) do
       Claper.Events.Event.subscribe(event.uuid)
+      Claper.Presentations.subscribe(event.presentation_file.id)
 
       Presence.track(
         self(),
@@ -176,6 +177,13 @@ defmodule ClaperWeb.EventLive.Show do
      |> maybe_disable_empty_room}
   end
 
+  @impl true
+  def handle_info({:state_updated, presentation_state}, socket) do
+    {:noreply,
+     socket
+      |> assign(:state, presentation_state)}
+  end
+
   @impl true
   def handle_info(
         {:banned, user_id},
diff --git a/lib/claper_web/live/event_live/show.html.heex b/lib/claper_web/live/event_live/show.html.heex
index ab06320..d66b040 100644
--- a/lib/claper_web/live/event_live/show.html.heex
+++ b/lib/claper_web/live/event_live/show.html.heex
@@ -107,7 +107,7 @@
       <% end %>
     </div>
 
-    <%= if @empty_room do %>
+    <%= if @empty_room && @state.chat_enabled do %>
       <div class="text-2xl text-white block fixed bottom-32 left-0 w-full lg:w-1/3 lg:left-1/2 lg:transform lg:-translate-x-1/2 text-center opacity-30">
         <span><%= gettext("Be the first to react !") %></span>
         <img src="/images/icons/arrow-white.svg" class="h-24 rotate-180 ml-12 mt-8" />
@@ -123,38 +123,67 @@
     >
     </div>
 
-    <.form
-      :let={f}
-      for={@post_changeset}
-      id="post-form"
-      class="fixed bottom-12 w-full lg:w-1/3 lg:mx-auto"
-      phx-hook="PostForm"
-      phx-submit="save"
-    >
-      <div
-        class="rounded-full text-base px-4 py-2 mx-5 relative"
-        style="
-        background: rgb(17,134,213);
-        background: linear-gradient(333deg, rgba(17,134,213,0.4962359943977591) 0%, rgba(163,39,255,0.5046393557422969) 100%);
-        box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
-        backdrop-filter: blur(11.5px);
-        -webkit-backdrop-filter: blur(11.5px);"
+    <%= if @state.chat_enabled do %>
+      <.form
+        :let={f}
+        for={@post_changeset}
+        id="post-form"
+        class="fixed bottom-12 w-full lg:w-1/3 lg:mx-auto"
+        phx-hook="PostForm"
+        phx-submit="save"
       >
-        <button class="absolute right-10 top-4 opacity-50" id="submitBtn">
-          <img src="/images/icons/send.svg" class="h-6" />
-        </button>
-        <div class="flex space-x-2 items-center">
-          <%= textarea(f, :body,
-            id: "postFormTA",
-            class:
-              "bg-transparent outline-none w-full text-white h-10 placeholder-white pt-3 resize-none pr-20 leading-4 overflow-y-hidden focus:overflow-y-auto",
-            placeholder: gettext("Ask, comment...")
-          ) %>
+        <div
+          class="rounded-full text-base px-4 py-2 mx-5 relative"
+          style="
+          background: rgb(17,134,213);
+          background: linear-gradient(333deg, rgba(17,134,213,0.4962359943977591) 0%, rgba(163,39,255,0.5046393557422969) 100%);
+          box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
+          backdrop-filter: blur(11.5px);
+          -webkit-backdrop-filter: blur(11.5px);"
+        >
+          <button class="absolute right-10 top-4 opacity-50" id="submitBtn">
+            <img src="/images/icons/send.svg" class="h-6" />
+          </button>
+
+          <div class="flex space-x-2 items-center">
+            <%= textarea(f, :body,
+              id: "postFormTA",
+              class:
+                "bg-transparent outline-none w-full text-white h-10 placeholder-white pt-3 resize-none pr-20 leading-4 overflow-y-hidden focus:overflow-y-auto",
+              placeholder: gettext("Ask, comment...")
+            ) %>
+          </div>
+        </div>
+        <%= error_tag(f, :body) %>
+        <%= submit("Save", phx_disable_with: "Saving...", id: "hiddenSubmit", class: "hidden") %>
+      </.form>
+
+    <% else %>
+
+    <div
+        id="post-form"
+        class="fixed bottom-12 w-full lg:w-1/3 lg:mx-auto"
+      >
+        <div
+          class="rounded-full text-base px-4 py-2 mx-5 relative"
+          style="
+          background: rgb(17,134,213);
+          background: linear-gradient(333deg, rgba(17,134,213,0.4962359943977591) 0%, rgba(163,39,255,0.5046393557422969) 100%);
+          box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
+          backdrop-filter: blur(11.5px);
+          -webkit-backdrop-filter: blur(11.5px);"
+        >
+
+          <div class="flex space-x-2 items-center">
+            <div class="opacity-50 bg-transparent outline-none w-full text-white h-10 placeholder-white pt-3 resize-none pr-20 leading-4 overflow-y-hidden focus:overflow-y-auto">
+              <%= gettext("Messages deactivated") %>
+            </div>
+          </div>
         </div>
       </div>
-      <%= error_tag(f, :body) %>
-      <%= submit("Save", phx_disable_with: "Saving...", id: "hiddenSubmit", class: "hidden") %>
-    </.form>
+
+
+    <% end %>
 
     <div class="flex space-x-6 fixed justify-center bottom-3 w-full lg:w-1/3 lg:mx-auto">
       <a
diff --git a/priv/gettext/default.pot b/priv/gettext/default.pot
index 7f08cbe..b08b564 100644
--- a/priv/gettext/default.pot
+++ b/priv/gettext/default.pot
@@ -17,7 +17,7 @@ msgstr ""
 msgid "Settings"
 msgstr ""
 
-#: lib/claper_web/live/event_live/manage.ex:421
+#: lib/claper_web/live/event_live/manage.ex:438
 #: lib/claper_web/live/form_live/form_component.html.heex:37
 #: lib/claper_web/live/user_settings_live/show.html.heex:34
 #: lib/claper_web/templates/user_registration/new.html.heex:34
@@ -77,17 +77,17 @@ msgstr ""
 msgid "Your personal informations only visible by you"
 msgstr ""
 
-#: lib/claper_web/live/event_live/show.html.heex:220
+#: lib/claper_web/live/event_live/show.html.heex:249
 #, elixir-autogen, elixir-format
 msgid "days"
 msgstr ""
 
-#: lib/claper_web/live/event_live/show.html.heex:226
+#: lib/claper_web/live/event_live/show.html.heex:255
 #, elixir-autogen, elixir-format
 msgid "hours"
 msgstr ""
 
-#: lib/claper_web/live/event_live/show.html.heex:232
+#: lib/claper_web/live/event_live/show.html.heex:261
 #, elixir-autogen, elixir-format
 msgid "minutes"
 msgstr ""
@@ -116,7 +116,7 @@ msgstr ""
 msgid "Host"
 msgstr ""
 
-#: lib/claper_web/live/event_live/show.html.heex:238
+#: lib/claper_web/live/event_live/show.html.heex:267
 #, elixir-autogen, elixir-format
 msgid "seconds"
 msgstr ""
@@ -168,7 +168,7 @@ msgid "Name of your presentation"
 msgstr ""
 
 #: lib/claper_web/live/event_live/presenter.html.heex:21
-#: lib/claper_web/live/event_live/show.html.heex:247
+#: lib/claper_web/live/event_live/show.html.heex:276
 #, elixir-autogen, elixir-format
 msgid "Scan to interact in real-time"
 msgstr ""
@@ -178,7 +178,7 @@ msgstr ""
 msgid "Starting on"
 msgstr ""
 
-#: lib/claper_web/live/event_live/event_form_component.ex:203
+#: lib/claper_web/live/event_live/event_form_component.ex:205
 #, elixir-autogen, elixir-format
 msgid "Updated successfully"
 msgstr ""
@@ -205,7 +205,7 @@ msgstr ""
 msgid "Return to home"
 msgstr ""
 
-#: lib/claper_web/live/event_live/event_form_component.ex:175
+#: lib/claper_web/live/event_live/event_form_component.ex:177
 #, elixir-autogen, elixir-format
 msgid "Created successfully"
 msgstr ""
@@ -350,12 +350,12 @@ msgstr ""
 msgid "or drag and drop"
 msgstr ""
 
-#: lib/claper_web/live/event_live/event_form_component.ex:212
+#: lib/claper_web/live/event_live/event_form_component.ex:214
 #, elixir-autogen, elixir-format
 msgid "You have selected an incorrect file type"
 msgstr ""
 
-#: lib/claper_web/live/event_live/event_form_component.ex:211
+#: lib/claper_web/live/event_live/event_form_component.ex:213
 #, elixir-autogen, elixir-format
 msgid "Your file is too large"
 msgstr ""
@@ -385,7 +385,7 @@ msgstr ""
 msgid "Title of your poll"
 msgstr ""
 
-#: lib/claper_web/live/event_live/event_form_component.ex:213
+#: lib/claper_web/live/event_live/event_form_component.ex:215
 #, elixir-autogen, elixir-format
 msgid "Upload failed"
 msgstr ""
@@ -456,7 +456,7 @@ msgstr ""
 msgid "Messages from attendees will appear here."
 msgstr ""
 
-#: lib/claper_web/live/event_live/manage.html.heex:763
+#: lib/claper_web/live/event_live/manage.html.heex:764
 #, elixir-autogen, elixir-format
 msgid "On screen settings"
 msgstr ""
@@ -481,23 +481,12 @@ msgstr ""
 msgid "Press <strong>F</strong> in the presentation window to enable fullscreen"
 msgstr ""
 
-#: lib/claper_web/live/event_live/show.html.heex:151
+#: lib/claper_web/live/event_live/show.html.heex:153
 #, elixir-autogen, elixir-format
 msgid "Ask, comment..."
 msgstr ""
 
-#: lib/claper_web/live/event_live/manage.html.heex:784
-#, elixir-autogen, elixir-format
-msgid "Active poll results"
-msgstr ""
-
-#: lib/claper_web/live/event_live/manage.html.heex:770
-#, elixir-autogen, elixir-format
-msgid "Instructions"
-msgstr ""
-
 #: lib/claper_web/live/event_live/manage.html.heex:556
-#: lib/claper_web/live/event_live/manage.html.heex:775
 #: lib/claper_web/live/stat_live/index.html.heex:71
 #, elixir-autogen, elixir-format
 msgid "Messages"
@@ -552,8 +541,8 @@ msgid "Blocking this user will delete all his messages and he will not be able t
 msgstr ""
 
 #: lib/claper_web/live/event_live/show.ex:50
-#: lib/claper_web/live/event_live/show.ex:188
-#: lib/claper_web/live/event_live/show.ex:203
+#: lib/claper_web/live/event_live/show.ex:196
+#: lib/claper_web/live/event_live/show.ex:211
 #, elixir-autogen, elixir-format
 msgid "You have been banned from this event"
 msgstr ""
@@ -695,11 +684,6 @@ msgstr ""
 msgid "Error when processing the new file"
 msgstr ""
 
-#: lib/claper_web/live/event_live/event_form_component.html.heex:78
-#, elixir-autogen, elixir-format
-msgid "PDF, PPT, PPTX up to 15MB"
-msgstr ""
-
 #: lib/claper_web/live/event_live/join.html.heex:23
 #: lib/claper_web/live/event_live/join.html.heex:44
 #, elixir-autogen, elixir-format
@@ -719,7 +703,7 @@ msgid "Connect to your account"
 msgstr ""
 
 #: lib/claper_web/live/event_live/presenter.html.heex:33
-#: lib/claper_web/live/event_live/show.html.heex:256
+#: lib/claper_web/live/event_live/show.html.heex:285
 #, elixir-autogen, elixir-format
 msgid "Or use the code:"
 msgstr ""
@@ -811,7 +795,7 @@ msgstr ""
 msgid "Form submissions from attendees will appear here."
 msgstr ""
 
-#: lib/claper_web/live/event_live/manage.ex:420
+#: lib/claper_web/live/event_live/manage.ex:437
 #, elixir-autogen, elixir-format
 msgid "Name"
 msgstr ""
@@ -900,3 +884,38 @@ msgstr ""
 #, elixir-autogen, elixir-format
 msgid "Select presentation"
 msgstr ""
+
+#: lib/claper_web/live/event_live/event_form_component.html.heex:78
+#, elixir-autogen, elixir-format
+msgid "PDF, PPT, PPTX up to %{size} MB"
+msgstr ""
+
+#: lib/claper_web/live/event_live/manage.html.heex:790
+#, elixir-autogen, elixir-format
+msgid "Attendees settings"
+msgstr ""
+
+#: lib/claper_web/live/event_live/manage.html.heex:797
+#, elixir-autogen, elixir-format
+msgid "Enable messages"
+msgstr ""
+
+#: lib/claper_web/live/event_live/manage.html.heex:771
+#, elixir-autogen, elixir-format
+msgid "Show instructions"
+msgstr ""
+
+#: lib/claper_web/live/event_live/manage.html.heex:776
+#, elixir-autogen, elixir-format
+msgid "Show messages"
+msgstr ""
+
+#: lib/claper_web/live/event_live/manage.html.heex:785
+#, elixir-autogen, elixir-format
+msgid "Show poll results"
+msgstr ""
+
+#: lib/claper_web/live/event_live/show.html.heex:179
+#, elixir-autogen, elixir-format
+msgid "Messages deactivated"
+msgstr ""
diff --git a/priv/gettext/en/LC_MESSAGES/default.po b/priv/gettext/en/LC_MESSAGES/default.po
index 295451c..b2ba1a7 100644
--- a/priv/gettext/en/LC_MESSAGES/default.po
+++ b/priv/gettext/en/LC_MESSAGES/default.po
@@ -18,7 +18,7 @@ msgstr ""
 msgid "Settings"
 msgstr ""
 
-#: lib/claper_web/live/event_live/manage.ex:421
+#: lib/claper_web/live/event_live/manage.ex:438
 #: lib/claper_web/live/form_live/form_component.html.heex:37
 #: lib/claper_web/live/user_settings_live/show.html.heex:34
 #: lib/claper_web/templates/user_registration/new.html.heex:34
@@ -78,17 +78,17 @@ msgstr ""
 msgid "Your personal informations only visible by you"
 msgstr ""
 
-#: lib/claper_web/live/event_live/show.html.heex:220
+#: lib/claper_web/live/event_live/show.html.heex:249
 #, elixir-autogen, elixir-format
 msgid "days"
 msgstr ""
 
-#: lib/claper_web/live/event_live/show.html.heex:226
+#: lib/claper_web/live/event_live/show.html.heex:255
 #, elixir-autogen, elixir-format
 msgid "hours"
 msgstr ""
 
-#: lib/claper_web/live/event_live/show.html.heex:232
+#: lib/claper_web/live/event_live/show.html.heex:261
 #, elixir-autogen, elixir-format
 msgid "minutes"
 msgstr ""
@@ -117,7 +117,7 @@ msgstr ""
 msgid "Host"
 msgstr ""
 
-#: lib/claper_web/live/event_live/show.html.heex:238
+#: lib/claper_web/live/event_live/show.html.heex:267
 #, elixir-autogen, elixir-format, fuzzy
 msgid "seconds"
 msgstr ""
@@ -169,7 +169,7 @@ msgid "Name of your presentation"
 msgstr ""
 
 #: lib/claper_web/live/event_live/presenter.html.heex:21
-#: lib/claper_web/live/event_live/show.html.heex:247
+#: lib/claper_web/live/event_live/show.html.heex:276
 #, elixir-autogen, elixir-format
 msgid "Scan to interact in real-time"
 msgstr ""
@@ -179,7 +179,7 @@ msgstr ""
 msgid "Starting on"
 msgstr ""
 
-#: lib/claper_web/live/event_live/event_form_component.ex:203
+#: lib/claper_web/live/event_live/event_form_component.ex:205
 #, elixir-autogen, elixir-format
 msgid "Updated successfully"
 msgstr ""
@@ -206,7 +206,7 @@ msgstr ""
 msgid "Return to home"
 msgstr ""
 
-#: lib/claper_web/live/event_live/event_form_component.ex:175
+#: lib/claper_web/live/event_live/event_form_component.ex:177
 #, elixir-autogen, elixir-format, fuzzy
 msgid "Created successfully"
 msgstr ""
@@ -351,12 +351,12 @@ msgstr ""
 msgid "or drag and drop"
 msgstr ""
 
-#: lib/claper_web/live/event_live/event_form_component.ex:212
+#: lib/claper_web/live/event_live/event_form_component.ex:214
 #, elixir-autogen, elixir-format, fuzzy
 msgid "You have selected an incorrect file type"
 msgstr ""
 
-#: lib/claper_web/live/event_live/event_form_component.ex:211
+#: lib/claper_web/live/event_live/event_form_component.ex:213
 #, elixir-autogen, elixir-format
 msgid "Your file is too large"
 msgstr ""
@@ -386,7 +386,7 @@ msgstr ""
 msgid "Title of your poll"
 msgstr ""
 
-#: lib/claper_web/live/event_live/event_form_component.ex:213
+#: lib/claper_web/live/event_live/event_form_component.ex:215
 #, elixir-autogen, elixir-format, fuzzy
 msgid "Upload failed"
 msgstr ""
@@ -457,7 +457,7 @@ msgstr ""
 msgid "Messages from attendees will appear here."
 msgstr ""
 
-#: lib/claper_web/live/event_live/manage.html.heex:763
+#: lib/claper_web/live/event_live/manage.html.heex:764
 #, elixir-autogen, elixir-format
 msgid "On screen settings"
 msgstr ""
@@ -482,23 +482,12 @@ msgstr ""
 msgid "Press <strong>F</strong> in the presentation window to enable fullscreen"
 msgstr ""
 
-#: lib/claper_web/live/event_live/show.html.heex:151
+#: lib/claper_web/live/event_live/show.html.heex:153
 #, elixir-autogen, elixir-format
 msgid "Ask, comment..."
 msgstr ""
 
-#: lib/claper_web/live/event_live/manage.html.heex:784
-#, elixir-autogen, elixir-format
-msgid "Active poll results"
-msgstr ""
-
-#: lib/claper_web/live/event_live/manage.html.heex:770
-#, elixir-autogen, elixir-format
-msgid "Instructions"
-msgstr ""
-
 #: lib/claper_web/live/event_live/manage.html.heex:556
-#: lib/claper_web/live/event_live/manage.html.heex:775
 #: lib/claper_web/live/stat_live/index.html.heex:71
 #, elixir-autogen, elixir-format, fuzzy
 msgid "Messages"
@@ -553,8 +542,8 @@ msgid "Blocking this user will delete all his messages and he will not be able t
 msgstr ""
 
 #: lib/claper_web/live/event_live/show.ex:50
-#: lib/claper_web/live/event_live/show.ex:188
-#: lib/claper_web/live/event_live/show.ex:203
+#: lib/claper_web/live/event_live/show.ex:196
+#: lib/claper_web/live/event_live/show.ex:211
 #, elixir-autogen, elixir-format
 msgid "You have been banned from this event"
 msgstr ""
@@ -696,11 +685,6 @@ msgstr ""
 msgid "Error when processing the new file"
 msgstr ""
 
-#: lib/claper_web/live/event_live/event_form_component.html.heex:78
-#, elixir-autogen, elixir-format, fuzzy
-msgid "PDF, PPT, PPTX up to 15MB"
-msgstr ""
-
 #: lib/claper_web/live/event_live/join.html.heex:23
 #: lib/claper_web/live/event_live/join.html.heex:44
 #, elixir-autogen, elixir-format
@@ -720,7 +704,7 @@ msgid "Connect to your account"
 msgstr ""
 
 #: lib/claper_web/live/event_live/presenter.html.heex:33
-#: lib/claper_web/live/event_live/show.html.heex:256
+#: lib/claper_web/live/event_live/show.html.heex:285
 #, elixir-autogen, elixir-format
 msgid "Or use the code:"
 msgstr ""
@@ -812,7 +796,7 @@ msgstr ""
 msgid "Form submissions from attendees will appear here."
 msgstr ""
 
-#: lib/claper_web/live/event_live/manage.ex:420
+#: lib/claper_web/live/event_live/manage.ex:437
 #, elixir-autogen, elixir-format
 msgid "Name"
 msgstr ""
@@ -901,3 +885,38 @@ msgstr ""
 #, elixir-autogen, elixir-format, fuzzy
 msgid "Select presentation"
 msgstr ""
+
+#: lib/claper_web/live/event_live/event_form_component.html.heex:78
+#, elixir-autogen, elixir-format, fuzzy
+msgid "PDF, PPT, PPTX up to %{size} MB"
+msgstr ""
+
+#: lib/claper_web/live/event_live/manage.html.heex:790
+#, elixir-autogen, elixir-format
+msgid "Attendees settings"
+msgstr ""
+
+#: lib/claper_web/live/event_live/manage.html.heex:797
+#, elixir-autogen, elixir-format
+msgid "Enable messages"
+msgstr ""
+
+#: lib/claper_web/live/event_live/manage.html.heex:771
+#, elixir-autogen, elixir-format
+msgid "Show instructions"
+msgstr ""
+
+#: lib/claper_web/live/event_live/manage.html.heex:776
+#, elixir-autogen, elixir-format, fuzzy
+msgid "Show messages"
+msgstr ""
+
+#: lib/claper_web/live/event_live/manage.html.heex:785
+#, elixir-autogen, elixir-format
+msgid "Show poll results"
+msgstr ""
+
+#: lib/claper_web/live/event_live/show.html.heex:179
+#, elixir-autogen, elixir-format, fuzzy
+msgid "Messages deactivated"
+msgstr ""
diff --git a/priv/gettext/fr/LC_MESSAGES/default.po b/priv/gettext/fr/LC_MESSAGES/default.po
index a5b35e6..e565a92 100644
--- a/priv/gettext/fr/LC_MESSAGES/default.po
+++ b/priv/gettext/fr/LC_MESSAGES/default.po
@@ -18,7 +18,7 @@ msgstr ""
 msgid "Settings"
 msgstr "Paramètres"
 
-#: lib/claper_web/live/event_live/manage.ex:421
+#: lib/claper_web/live/event_live/manage.ex:438
 #: lib/claper_web/live/form_live/form_component.html.heex:37
 #: lib/claper_web/live/user_settings_live/show.html.heex:34
 #: lib/claper_web/templates/user_registration/new.html.heex:34
@@ -78,17 +78,17 @@ msgstr "Nous vous avons envoyé un email à"
 msgid "Your personal informations only visible by you"
 msgstr "Vos informations personnelles ne sont visibles que par vous"
 
-#: lib/claper_web/live/event_live/show.html.heex:220
+#: lib/claper_web/live/event_live/show.html.heex:249
 #, elixir-autogen, elixir-format
 msgid "days"
 msgstr "jours"
 
-#: lib/claper_web/live/event_live/show.html.heex:226
+#: lib/claper_web/live/event_live/show.html.heex:255
 #, elixir-autogen, elixir-format
 msgid "hours"
 msgstr "heures"
 
-#: lib/claper_web/live/event_live/show.html.heex:232
+#: lib/claper_web/live/event_live/show.html.heex:261
 #, elixir-autogen, elixir-format
 msgid "minutes"
 msgstr "minutes"
@@ -117,7 +117,7 @@ msgstr "Tableau de bord"
 msgid "Host"
 msgstr "Animateur"
 
-#: lib/claper_web/live/event_live/show.html.heex:238
+#: lib/claper_web/live/event_live/show.html.heex:267
 #, elixir-autogen, elixir-format, fuzzy
 msgid "seconds"
 msgstr "secondes"
@@ -169,7 +169,7 @@ msgid "Name of your presentation"
 msgstr "Nom de votre présentation"
 
 #: lib/claper_web/live/event_live/presenter.html.heex:21
-#: lib/claper_web/live/event_live/show.html.heex:247
+#: lib/claper_web/live/event_live/show.html.heex:276
 #, elixir-autogen, elixir-format
 msgid "Scan to interact in real-time"
 msgstr "Scannez pour interagir en temps réel"
@@ -179,7 +179,7 @@ msgstr "Scannez pour interagir en temps réel"
 msgid "Starting on"
 msgstr "Commence le"
 
-#: lib/claper_web/live/event_live/event_form_component.ex:203
+#: lib/claper_web/live/event_live/event_form_component.ex:205
 #, elixir-autogen, elixir-format
 msgid "Updated successfully"
 msgstr "Mis à jour avec succès"
@@ -206,7 +206,7 @@ msgstr "C'est le moment de propulser vos présentations."
 msgid "Return to home"
 msgstr "Retourner à l'accueil"
 
-#: lib/claper_web/live/event_live/event_form_component.ex:175
+#: lib/claper_web/live/event_live/event_form_component.ex:177
 #, elixir-autogen, elixir-format, fuzzy
 msgid "Created successfully"
 msgstr "Mis à jour avec succès"
@@ -351,12 +351,12 @@ msgstr "Chargez un fichier"
 msgid "or drag and drop"
 msgstr "ou glisser-déposer"
 
-#: lib/claper_web/live/event_live/event_form_component.ex:212
+#: lib/claper_web/live/event_live/event_form_component.ex:214
 #, elixir-autogen, elixir-format, fuzzy
 msgid "You have selected an incorrect file type"
 msgstr "Vous avez sélectionné un type de fichier incorrect"
 
-#: lib/claper_web/live/event_live/event_form_component.ex:211
+#: lib/claper_web/live/event_live/event_form_component.ex:213
 #, elixir-autogen, elixir-format
 msgid "Your file is too large"
 msgstr "Votre fichier est trop volumineux"
@@ -386,7 +386,7 @@ msgstr "Nouveau sondage"
 msgid "Title of your poll"
 msgstr "Titre de votre sondage"
 
-#: lib/claper_web/live/event_live/event_form_component.ex:213
+#: lib/claper_web/live/event_live/event_form_component.ex:215
 #, elixir-autogen, elixir-format, fuzzy
 msgid "Upload failed"
 msgstr "Échec du chargement"
@@ -457,10 +457,10 @@ msgstr "La modification de votre fichier supprimera tous les éléments d'intera
 msgid "Messages from attendees will appear here."
 msgstr "Les messages des participants apparaîtront ici."
 
-#: lib/claper_web/live/event_live/manage.html.heex:763
+#: lib/claper_web/live/event_live/manage.html.heex:764
 #, elixir-autogen, elixir-format
 msgid "On screen settings"
-msgstr "Paramètres à l'écran"
+msgstr "Paramètres écran"
 
 #: lib/claper_web/live/event_live/event_card_component.ex:139
 #, elixir-autogen, elixir-format
@@ -482,23 +482,12 @@ msgstr "Démarrer"
 msgid "Press <strong>F</strong> in the presentation window to enable fullscreen"
 msgstr "Appuyez sur <strong>F</strong> dans la fenêtre de présentation pour activer le plein écran"
 
-#: lib/claper_web/live/event_live/show.html.heex:151
+#: lib/claper_web/live/event_live/show.html.heex:153
 #, elixir-autogen, elixir-format
 msgid "Ask, comment..."
 msgstr "Questionnez, commentez..."
 
-#: lib/claper_web/live/event_live/manage.html.heex:784
-#, elixir-autogen, elixir-format
-msgid "Active poll results"
-msgstr "Résultats du sondage actif"
-
-#: lib/claper_web/live/event_live/manage.html.heex:770
-#, elixir-autogen, elixir-format
-msgid "Instructions"
-msgstr "Instructions"
-
 #: lib/claper_web/live/event_live/manage.html.heex:556
-#: lib/claper_web/live/event_live/manage.html.heex:775
 #: lib/claper_web/live/stat_live/index.html.heex:71
 #, elixir-autogen, elixir-format, fuzzy
 msgid "Messages"
@@ -553,8 +542,8 @@ msgid "Blocking this user will delete all his messages and he will not be able t
 msgstr "Bloquer cet utilisateur supprimera tous ses messages et il ne pourra pas rejoindre à nouveau, confirmer ?"
 
 #: lib/claper_web/live/event_live/show.ex:50
-#: lib/claper_web/live/event_live/show.ex:188
-#: lib/claper_web/live/event_live/show.ex:203
+#: lib/claper_web/live/event_live/show.ex:196
+#: lib/claper_web/live/event_live/show.ex:211
 #, elixir-autogen, elixir-format
 msgid "You have been banned from this event"
 msgstr "Vous avez été banni de cet événement"
@@ -696,11 +685,6 @@ msgstr "Erreur lors du traitement du fichier"
 msgid "Error when processing the new file"
 msgstr "Erreur lors du traitement du nouveau fichier"
 
-#: lib/claper_web/live/event_live/event_form_component.html.heex:78
-#, elixir-autogen, elixir-format, fuzzy
-msgid "PDF, PPT, PPTX up to 15MB"
-msgstr "PDF, PPT, PPTX jusqu'à 15MB"
-
 #: lib/claper_web/live/event_live/join.html.heex:23
 #: lib/claper_web/live/event_live/join.html.heex:44
 #, elixir-autogen, elixir-format
@@ -720,7 +704,7 @@ msgid "Connect to your account"
 msgstr "Connectez-vous à votre compte"
 
 #: lib/claper_web/live/event_live/presenter.html.heex:33
-#: lib/claper_web/live/event_live/show.html.heex:256
+#: lib/claper_web/live/event_live/show.html.heex:285
 #, elixir-autogen, elixir-format
 msgid "Or use the code:"
 msgstr "Ou utilisez le code:"
@@ -812,7 +796,7 @@ msgstr "Soumissions de formulaire"
 msgid "Form submissions from attendees will appear here."
 msgstr "Les formulaires soumis par les participants apparaîtront ici."
 
-#: lib/claper_web/live/event_live/manage.ex:420
+#: lib/claper_web/live/event_live/manage.ex:437
 #, elixir-autogen, elixir-format
 msgid "Name"
 msgstr "Nom"
@@ -901,3 +885,38 @@ msgstr "Interactions importées avec succès"
 #, elixir-autogen, elixir-format, fuzzy
 msgid "Select presentation"
 msgstr "Sélectionnez la présentation"
+
+#: lib/claper_web/live/event_live/event_form_component.html.heex:78
+#, elixir-autogen, elixir-format, fuzzy
+msgid "PDF, PPT, PPTX up to %{size} MB"
+msgstr "PDF, PPT, PPTX jusqu'à %{size} MB"
+
+#: lib/claper_web/live/event_live/manage.html.heex:790
+#, elixir-autogen, elixir-format
+msgid "Attendees settings"
+msgstr "Paramètres participants"
+
+#: lib/claper_web/live/event_live/manage.html.heex:797
+#, elixir-autogen, elixir-format
+msgid "Enable messages"
+msgstr "Activer messages"
+
+#: lib/claper_web/live/event_live/manage.html.heex:771
+#, elixir-autogen, elixir-format
+msgid "Show instructions"
+msgstr "Afficher instructions"
+
+#: lib/claper_web/live/event_live/manage.html.heex:776
+#, elixir-autogen, elixir-format, fuzzy
+msgid "Show messages"
+msgstr "Afficher messages"
+
+#: lib/claper_web/live/event_live/manage.html.heex:785
+#, elixir-autogen, elixir-format
+msgid "Show poll results"
+msgstr "Afficher résultats sondage"
+
+#: lib/claper_web/live/event_live/show.html.heex:179
+#, elixir-autogen, elixir-format, fuzzy
+msgid "Messages deactivated"
+msgstr "Messages désactivés"
diff --git a/priv/repo/migrations/20230421093834_add_chat_enabled_to_presentation_states.exs b/priv/repo/migrations/20230421093834_add_chat_enabled_to_presentation_states.exs
new file mode 100644
index 0000000..edaea64
--- /dev/null
+++ b/priv/repo/migrations/20230421093834_add_chat_enabled_to_presentation_states.exs
@@ -0,0 +1,9 @@
+defmodule Claper.Repo.Migrations.AddChatEnabledToPresentationStates do
+  use Ecto.Migration
+
+  def change do
+    alter table(:presentation_states) do
+      add :chat_enabled, :boolean, default: true
+    end
+  end
+end
diff --git a/test/claper/events_test.exs b/test/claper/events_test.exs
index 56826b1..c854ac6 100644
--- a/test/claper/events_test.exs
+++ b/test/claper/events_test.exs
@@ -92,8 +92,8 @@ defmodule Claper.EventsTest do
       from_event = event_fixture(%{user: bad_user, name: "from event"})
       to_event = event_fixture(%{user: user, name: "to event"})
       from_presentation_file = presentation_file_fixture(%{event: from_event})
-      from_poll = poll_fixture(%{presentation_file_id: from_presentation_file.id})
-      to_presentation_file = presentation_file_fixture(%{event: to_event, hash: "444444"})
+      _from_poll = poll_fixture(%{presentation_file_id: from_presentation_file.id})
+      _to_presentation_file = presentation_file_fixture(%{event: to_event, hash: "444444"})
 
       assert_raise Ecto.NoResultsError, fn ->
         Events.import(user.id, from_event.uuid, to_event.uuid)