Mate Desktop questions

[Linux for blind general discussion]

Hi all,

I am setting up two laptops for sighted people, but I will be 
maintaining/supporting them. I am using Linux Mint Mate 20.2. I have two 
questions...
1. How do I access the task bar/system tray using Orca?
2. The Logon screen has multiple users defined. Sometimes, Orca will not 
speak on this screen. This sometimes happens at boot, but always happens 
after logging off one user and wanting to login again as a different 
user. When this happens, the Alt+Super+S keys have no effect. Other 
times it works perfectly fine--frustrating. Any thoughts/suggestions on 
this one?

Thanks,
John