If you have applications that you want to keep always visible, you can customize them so that they do not hide in single application mode or when you choose Hide Others from the Switch menu.
Open Application Wizard.
On macOS 13 or later, choose Application Wizard > Settings. On macOS 12 or 11, choose Application Wizard > Preferences. Then click Applications.
Click the Add (+) button at the bottom of the list, browse and select the application, and click Add. Alternatively, you can drag the application from the Applications panel or from the Finder to the list.
In the “Do not hide” section:
Select the On Hide Others checkbox if you want to keep the application visible when you choose Hide Others from the Switch menu.
Select the “In single application mode” checkbox if you want to keep the application always visible when single application mode is turned on.
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