diff --git a/apps/client/src/components/layouts/global/global-app-shell.tsx b/apps/client/src/components/layouts/global/global-app-shell.tsx
index 4740027..e5fe224 100644
--- a/apps/client/src/components/layouts/global/global-app-shell.tsx
+++ b/apps/client/src/components/layouts/global/global-app-shell.tsx
@@ -26,6 +26,7 @@ export default function GlobalAppShell({
   const sidebarRef = useRef(null);
 
   const startResizing = React.useCallback((mouseDownEvent) => {
+    mouseDownEvent.preventDefault();
     setIsResizing(true);
   }, []);
 
diff --git a/apps/client/src/features/editor/components/math/math.module.css b/apps/client/src/features/editor/components/math/math.module.css
index 0bd15f7..fca3c6e 100644
--- a/apps/client/src/features/editor/components/math/math.module.css
+++ b/apps/client/src/features/editor/components/math/math.module.css
@@ -7,6 +7,7 @@
     transition: background-color 0.2s;
     padding: 0 0.25rem;
     margin: 0 0.1rem;
+    user-select: none;
 
     &.empty {
         color: light-dark(var(--mantine-color-gray-6), var(--mantine-color-gray-4));
@@ -30,6 +31,7 @@
     transition: background-color 0.2s;
     margin: 0 0.1rem;
     overflow-x: auto;
+    user-select: none;
 
     .textInput {
         width: 400px;
diff --git a/apps/client/src/features/space/components/sidebar/space-sidebar.module.css b/apps/client/src/features/space/components/sidebar/space-sidebar.module.css
index b4a9b17..e2e0f6b 100644
--- a/apps/client/src/features/space/components/sidebar/space-sidebar.module.css
+++ b/apps/client/src/features/space/components/sidebar/space-sidebar.module.css
@@ -6,6 +6,7 @@
     padding-top: 0;
     display: flex;
     flex-direction: column;
+    user-select: none;
 }
 
 .section {