Slide / lift and slide

[Oz07]

Rear elevation on our new place is planned with 2 modest sliding patio doors and a single standard door on the utility. Is there a way to have the sliding doors slightly open but secure? I know back in the day we used to put a stick in the bottom rail as a sort of dead lock. I know in oz they have secure fly screen doors in front of the glass sliders. I am just wondering how I can leave the doors slightly open to get some air in for night purging etc while still having it secure.