With this active, you’ll need to press and then hold the Caps Lock key to enable typing in all caps. Under Input Sources, you can select the Use Caps Lock key to switch to and from last used Latin input source checkbox.Select Input Sources in the left column, and you can use the default key combination or set up your own. If you prefer a keyboard shortcut, you can activate it in the Shortcuts tab.If you check the box for Show input in menu bar, a menu bar icon appears, and you can quickly change the layout by clicking that icon and selecting the one you want.The trick then becomes how to switch the layout. You can add as many keyboard layouts as you want. How to add keyboard layouts in macOS Big Sur.