diff --git a/src/lib/components/chat/FileNav/FilePreview.svelte b/src/lib/components/chat/FileNav/FilePreview.svelte
index aa457e56b2..90c984e729 100644
--- a/src/lib/components/chat/FileNav/FilePreview.svelte
+++ b/src/lib/components/chat/FileNav/FilePreview.svelte
@@ -515,9 +515,10 @@
 		<div
 			class="absolute bottom-3 left-1/2 z-10 flex -translate-x-1/2 items-center gap-0.5 rounded-lg border border-gray-200/60 bg-white/90 px-1 py-0.5 shadow-lg backdrop-blur-sm dark:border-gray-700/60 dark:bg-gray-850/90"
 		>
+			<!-- Pinch covers in/out on coarse pointers; reset has no gesture, so it stays -->
 			<button
 				type="button"
-				class="inline-flex h-7 min-w-7 shrink-0 items-center justify-center rounded-md p-1.5 text-gray-500 transition hover:bg-gray-100 dark:text-gray-400 dark:hover:bg-gray-800"
+				class="inline-flex h-7 min-w-7 shrink-0 items-center justify-center rounded-md p-1.5 text-gray-500 transition hover:bg-gray-100 dark:text-gray-400 dark:hover:bg-gray-800 pointer-coarse:hidden"
 				on:click={() => panzoomRef?.zoomOut()}
 				aria-label={$i18n.t('Zoom out')}
 			>
@@ -544,7 +545,7 @@
 			</button>
 			<button
 				type="button"
-				class="inline-flex h-7 min-w-7 shrink-0 items-center justify-center rounded-md p-1.5 text-gray-500 transition hover:bg-gray-100 dark:text-gray-400 dark:hover:bg-gray-800"
+				class="inline-flex h-7 min-w-7 shrink-0 items-center justify-center rounded-md p-1.5 text-gray-500 transition hover:bg-gray-100 dark:text-gray-400 dark:hover:bg-gray-800 pointer-coarse:hidden"
 				on:click={() => panzoomRef?.zoomIn()}
 				aria-label={$i18n.t('Zoom in')}
 			>
diff --git a/src/lib/components/common/PDFViewer.svelte b/src/lib/components/common/PDFViewer.svelte
index c05a603da5..c8dfaabf35 100644
--- a/src/lib/components/common/PDFViewer.svelte
+++ b/src/lib/components/common/PDFViewer.svelte
@@ -536,9 +536,10 @@
 					</svg>
 				</button>
 			{/if}
+			<!-- Pinch covers in/out on coarse pointers; reset has no gesture, so it stays -->
 			<button
 				type="button"
-				class="shrink-0 min-w-7 h-7 inline-flex items-center justify-center p-1.5 rounded-md hover:bg-gray-100 dark:hover:bg-gray-800 transition text-gray-500 dark:text-gray-400"
+				class="shrink-0 min-w-7 h-7 inline-flex items-center justify-center p-1.5 rounded-md hover:bg-gray-100 dark:hover:bg-gray-800 transition text-gray-500 dark:text-gray-400 pointer-coarse:hidden"
 				on:click={zoomOut}
 				aria-label="Zoom out"
 			>
@@ -565,7 +566,7 @@
 			</button>
 			<button
 				type="button"
-				class="shrink-0 min-w-7 h-7 inline-flex items-center justify-center p-1.5 rounded-md hover:bg-gray-100 dark:hover:bg-gray-800 transition text-gray-500 dark:text-gray-400"
+				class="shrink-0 min-w-7 h-7 inline-flex items-center justify-center p-1.5 rounded-md hover:bg-gray-100 dark:hover:bg-gray-800 transition text-gray-500 dark:text-gray-400 pointer-coarse:hidden"
 				on:click={zoomIn}
 				aria-label="Zoom in"
 			>
diff --git a/src/lib/components/common/PptxPreview.svelte b/src/lib/components/common/PptxPreview.svelte
index 07aa82088d..d94708ddbf 100644
--- a/src/lib/components/common/PptxPreview.svelte
+++ b/src/lib/components/common/PptxPreview.svelte
@@ -344,9 +344,10 @@
 					/>
 				</svg>
 			</button>
+			<!-- Pinch covers in/out on coarse pointers; reset has no gesture, so it stays -->
 			<button
 				type="button"
-				class="shrink-0 min-w-7 h-7 inline-flex items-center justify-center p-1.5 rounded-md hover:bg-gray-100 dark:hover:bg-gray-800 transition text-gray-500 dark:text-gray-400"
+				class="shrink-0 min-w-7 h-7 inline-flex items-center justify-center p-1.5 rounded-md hover:bg-gray-100 dark:hover:bg-gray-800 transition text-gray-500 dark:text-gray-400 pointer-coarse:hidden"
 				on:click={zoomOut}
 				aria-label="Zoom out"
 			>
@@ -373,7 +374,7 @@
 			</button>
 			<button
 				type="button"
-				class="shrink-0 min-w-7 h-7 inline-flex items-center justify-center p-1.5 rounded-md hover:bg-gray-100 dark:hover:bg-gray-800 transition text-gray-500 dark:text-gray-400"
+				class="shrink-0 min-w-7 h-7 inline-flex items-center justify-center p-1.5 rounded-md hover:bg-gray-100 dark:hover:bg-gray-800 transition text-gray-500 dark:text-gray-400 pointer-coarse:hidden"
 				on:click={zoomIn}
 				aria-label="Zoom in"
 			>