Entity 'Show as' for covers

Hello,

I’m wondering how to use the Show as option in the entity configuration dialog to create cover.

If I show a switch as a cover, it works partially, I get the entity shown as cover but with only one direction working.

I guess I should set the cover to know which is the switch I want to use for the other direction, but I can’t find anything in the web UI to do this, do I need to get under the hood in yaml ?

Thanks everyone

Claudio