If you want to do a spring clean of your Workspaces but can't because you’re not the ‘Owner’, your access will be revoked once you leave all projects within that Workspace.
To do this:
Click and drag to select all of the projects within the Workspace you want to leave.
On one of the MarkUps click on the three dots in the top right-hand corner and click ‘Leave’.
This will remove your access to all the MarkUps and their Workspaces.