18.04: re-enable preferred keystroke combination for Workspaces?

Question

How do I invoke Workspaces on Ubuntu 18.04? It used to be:

ctrl+alt+ (up or down)

But my laptop crashed. After rebooting, those key combinations don't do anything.

Is there a way to configure Ubuntu to make them work again?

Answer 1

Workspaces is set in Tweaks.

If you have Tweaks installed, go to Workspaces and set the number of Workspaces required there.