The intuitiveness of the Mac

In windows, there is a keyboard button for this ...

If you want to do a screen capture for a particular application window, you can follow this:-

Switch to the screen that you wan to to do screen capture

Hold down Apple key ⌘ +

Shift + 4 and release all key

Now, You will see the mouse cursor will change to +

Press the space bar once

You will see the mouse cursor change to a camera

Now you can use the camera to select which application window to screen capture

Once finish, you will see a picture file in at your desktop.

That’s the screen capture picture!

REFS:

Answer source:

Closing thought(s):

And here I thought it was me...