Moving Workspace Browsers to the Foreground or Background
To bring an open Workspace browser to the foreground:

Choose
Window > Workspaces, and select an open Workspace browser from the submenu.
To cycle to the next or previous Workspace browser:

Press Command+Left/Right Arrow keys (Mac) or Control+Left/Right Arrow keys (Windows).
To bring all open Workspace browsers to the foreground:

Choose
Window > Workspaces > Bring to Front.

To bring all Workspace browsers to the foreground, press Option+J (Mac) or Alt+J (Windows).
To send all Workspace browsers to the background:

Choose
Window > Workspaces > Send to Back.

To send all Workspace browsers to the background, press Option+Shift+J (Mac) or Alt+Shift+J (Windows).
All open Workspace browsers are moved to the background, bringing the other windows to the foreground. Nonetheless, all Workspace browsers remain open and accessible.