Cannot edit tags for device in flow editor

Check this screenshot, I try to select (or edit) which button should be used for this flow, however no matter where I clicked, nothing selectable or editable popped up. Did I do something wrong?

Both are available and you can use it in the and or then chapter.
It here only shows wich vars are available and you can do nothing with it

Is described here and on a lot of other topics. Gonna have to close this topic. If you have any problems with that, please feel free to contact a moderator.