"webex control buttons"
Unfortunately this feature makes it very hard to control a remote shared desktop on Linux.
1. control buttons will hide part of the remote desktop (mostly parts of the task bar on Windows systems)
although you can hide the control buttons using Shift-Ctl-Q they will re-appear as soon as you press Esc Key. But Esc Key is often needed when working on Linux environments.
2. When you press the Esc key while control buttons are hidden, the control buttons will reappear but the Esc key press event will not get forwarded to the remote desktop. so you will have to press ESC again to achieve this.