Slide Control-Only One Panelist Displayed

Hello @ilze2 ,
My name is Brandon. Thanks for joining the Zoom Community! Per this documentation https://support.zoom.us/hc/en-us/articles/4411656450701-Controlling-slides-shared-by-another-participant I would say that the second panelist was not on the prerequisite version of 5.8.3 to perform this function. Therefore that could be why you were not able to pass the slide control to that panelist. 

After testing out this function extensively, I've also found a non-documented requirement.  In order to give slide control to another participant, they need to meet these requirements:

1. Be on Zoom client version 5.8.3 or above

2. Be logged in to their licensed account

3. Be a member of the same account

If these three conditions are not met, the option to share slide control with all participants will not be present.