Shortcut to display the preview of all workspaces in unity

Clash Royale CLAN TAG #URR8PPP up vote 1 down vote favorite In unity, does anyone know a shortcut to display the preview of all workspaces (as if you clicked the button of the workspaces on the dock)? I sometimes would like to have an overview of which desktops are already occupied or not before moving to another desktop. So far, to achieve that, I have to click on the button of the workspaces (on the dock). I am currently using an Ubuntu VM on a Mac OS X host. 16.04 unity mac workspaces dock share | improve this question edited Mar 7 at 15:53 asked Mar 7 at 15:40 nbro 124 6 add a comment  | up vote 1 down vote favorite In unity, does anyone know a shortcut to display the preview of all workspaces (as if you clicked the button of the workspaces on the dock)? I sometimes would like to have an overview of which desktops are already occupied or not before moving to another desktop. So far, to...