You don't make it. They're absolutely the same. It depends only on the event that opens it.
I.e. to open movies screen, something like
"goto screen films"
is called in eventgroups.
to open overlay, something like
"show overlay films"
is called.
that means that the button to open screen or overlay contains an event, and by changing this event (or assigning a different event to a button) you can change what it does.
So if u open editor with pause, and click the button that goes to films screen, check the group and name of the event that it executes.
Then close the editor and start configuration (F2) and find the event you found in editor.... and change it!
hope this helps, ask if you're unsure about anything. I don't know your xlobby knowledge level so don't go into more detail....
D.