Confluence will be unusable 23-July-2024 at 06:00 due to a Crowd upgrade.
...
This The expert mode window allows setting the main window display size as well as the dimension of the projection areas. :
The buttons are:
1. Open Evr - This will open the standard EVR configuration screen.
2. Apply - This will change the size of the main display screen and projection areas, if the given values are OK.
3. Close - This will close the Advanced Mode window.
4. OK- Change the size and close the window.
...