How to create a Light table mode action?

[Soom]

Before loosing all my panels, I had this action, that could switch on the Light Table mode > Image Mark. I don't remember how I created it, and I cannot find any way to do it again... any ideas?
thanks

[Soom]

Found it! Grab current Light Table - that's the option. Altohugh it grabs also all the light table set-up, not just the mode, but it suites me.