Freezing the Display in HDMI 2

[jennifer.stellpflug-oshkosh.k12.wi.us]

Is it possible to freeze the screen when I am in HDMI 2 and projecting my PC screen to the ViewBoard? For example, my agenda slide is on the screen. I want to freeze that so I can take attendance in a new tab without students seeing me do it.

[frank.chu-tw.viewsonic.com]

Hi:
The screen freeze like feature is located in ViewBoard Side Toolbar as below.

After you tap it, it will freeze the screen and you work on something else.

Thank you.