If you want to take control of another attendee's desktop, you can do so as long as both of you are using the Windows or Mac desktop app. This is especially useful for demonstration or troubleshooting purposes.
To use request desktop control
The other user shares his or her entire desktop (not just a window).
Choose Call, Request Shared Control.
The other users chooses Allow to allow shared control.
The gold band around the desktop turn red, and cursors of both users are labeled.
To end the shared session, either the viewer or the sharer chooses End .