When an investigator returns from another world and gets an explored-marker.
The rules say:
"While he remains in the gate’s location, he is no longer drawn through the gate, but may instead try to close or seal the gate"
Does "may" mean that he must not either close or seal the gate?
Can he simply do nothing at all und just sit there and wait for the perfect time to close/seal the gate? Perhaps waiting for another investigator in the same world or things like that?