To record a single window, choose the option Window
from the modal and then click on the window you want to record to make it active. You can also right-click the Window
button and select your window from the list.
If you want to record an app in full-screen mode, select `Display` instead of `Window`.
You can also use a shortcut `command`+`option`+`4` to start recording a window. More information about Screen Studio shortcuts can be found here.