My computer has two screens. There are four options in the Area setting.


1、Screen 1 (1920*1080): Selecting this will record the screen of screen 1


2、Primary screen(1600*900)：Selecting this will record the screen of Primary screen


3、Everything: Selecting this will record all the screens.


4、Custom Area：The screen recording area can be set at will
      Location: Set the position of recording screen
      Size: Set the size of recording screen


Drag to set position and size