To switch to another workspace, go to the left pane and click on the name of the workspace you want to access.
Note that you’ll be able to switch between those workspaces where you have a membership. To be able to change workspace settings, you must be either a Super Administrator or a Workspace Administrator. See how you can change roles.
If you want to see workspace settings, go to the Workspaces tab under your account settings. To switch between settings of different workspaces, click the drop-down near the name of the workspace and choose the one you need.