VIEWSONIC ViewBoard IFP8662 86" 4K Interactive Display - Manual (Page 34)

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Icon Description
More
View more applications within the ViewBoard tool bar.
Screen Freeze Spotlight Stopwatch Timer Air Class Screen Capture Hide/Unhide
Screen Freeze
Convert the currently displayed content into a still image; then you
can zoom in, zoom out, go back to full screen, and exit.
Zoom in Zoom out Full Screen Exit
Spotlight
Highlight the focus content zone. Tap the Setting icon to adjust the
spotlight size and alpha blending effect.