F3 toggles like hitboxes and chunk borders stay on after closing the debug screen, F3 lines keep a fixed layout you can edit with F3+F6, extra F3 shortcuts, and no telemetry.
F3 Fix fixes the new Minecraft F3 menu and keyboard shortcuts. Toggles like hitboxes and chunk borders stay on after closing the debug screen, F3 lines keep a fixed layout you can edit with F3+F6, extra F3 shortcuts, and no telemetry.