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On the left side, users can find the Signal source, Monitor Setting and User Mode icons here.
With different icons, it will show different contents:
For closing/moving windows:
For moving the window, users will only need to move the mouse the window, then press and
hold the left click to move the window; For closing the window, users either can click the red “X”
to close one by one or right click the mouse to find the “close all” function
