To take a snapshot, perform the following steps:
The snapshot shows up in the Media folder. It is saved by default in /tmp as
snap_date-time.ext BUT you can change the default directory path in Settings → Preferences → Interface tab in the right hand side of the Editing section.
Grabshot is the 6th menu item. A red circle reticle can be moved to the area to grab; use left mouse drag to surround an area; and right click to grab.
The CINELERRA-GG Community, 2021