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In the Video Surveillance monitor interface, when you create an inverted hiding mask, the Hide screen completely before and after mask checkbox is displayed, which allows the Operator to choose whether to hide the screen before and after the selected segment with inverted masking (see Masking areas on video at export). To hide this option for the Operator, do the following:
At the same time, you can allow the Operator to view live video before and after the specified mask by setting the Allow showing live video after creating inverted mask checkbox (2) and clicking the Apply button (3).
Configuring the permissions to view video before and after inverted mask is completed.