I know from here one can activate a visible feedback when switching from one workspace to another in KDE/PLASMA.
This only shows which desktop is being used by means of arrow and numbers. Is there a way to obtain a view of the workspaces in there as in gnome-unity / Ubuntu ?
EDIT: the picture shows what happens when I switch from one workspace to the next. The blue square is the arrival workspace, and the arrow signals the workspace I am moving from. Is it possible to have previews in here?