Windows 11 had multiple desktop support that you can set up. Handy if you want things arranged a certain way for one project (maybe work, etc) and another for messing around. The two rectangles lets you add a new desktop and toggle between them.
BUT, you can also do it with a keyboard shortcut... Ctrl+win+Left Arrow and Ctrl+win+Right Arrow. Or, you can use some of those neglected Macro keys on your awesome keyboard and program a macro to them. I have G16 and G17 on my Corsair set to Previous and Next Desktop. I color coded them differently to remind me that they're special and exist.
BUT, you can also do it with a keyboard shortcut... Ctrl+win+Left Arrow and Ctrl+win+Right Arrow. Or, you can use some of those neglected Macro keys on your awesome keyboard and program a macro to them. I have G16 and G17 on my Corsair set to Previous and Next Desktop. I color coded them differently to remind me that they're special and exist.