TANDBERG 880 MXP - Manual (Page 163)

General Use
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5.3.5 Snapshot Source
When you take a Snapshot, you get a snapshot of the Snapshot Source. Current is the default
Snapshot Source. This means that you take a snapshot of the video source that is currently
active.
You can change the Snapshot Source to any video source. In this way you can program the
snapshot key to apply only for PC for instance. Press Snapshot and you will take a PC snapshot
regardless of what video source that is currently active.