ios - How to cancel a Slide Over secondary app and choose a different app? -

i did ios 9 app using xcode 7.0 beta 3. shown @ doing slideover, did slide on , chose calendar app. in simulator device set ipad air 2. worked fine. but, when different ios 9 app , slide over, calendar app appears! how can things reset can choose secondary app when doing slide over? tried obvious things quitting , restarting xcode, , restarting mac book pro.

pull down top of slideover window.