Switch application method 1: Press F3, select the cursor to confirm, switch to the selected application, and then press F3 to return to the current state.
Switching application method 2: By default, the system defaults to press control+up key to confirm with the cursor, and press again to return to the current state.
Different programs: Command + Tab
Different windows of the same program: Command + ~ (just to the left of number key 1 or below Esc)
The program closed by Command+w cannot be opened again with Command+Tab (in fact, it is possible, but you have to press one more Alt key). But you can try Command+H, you can use Command+Tab to open it again.
Related reading with hyperdock
:
HyperDock: The best Mac window management in my eyes,
so that Mac can also have the window preview and management experience of Windows: HyperDock