To make the taskbar hide automatically when not in use, hit "Automatically hide the taskbar." To modify the Start Menu icon, press Start button style and then Windows 11.

While Windows 11 still doesn't let you manually resize the Start menu, this new iteration does automatically adjust based on the screen size.

Replacing the Windows Start menu If you want to really get serious about Start menu customization, you can replace the built-in offering with something completely new.