I have the following options
Settings->Require Passcode = After 1 hour
Display & Brightness -> Lock / Unlock (Auto lock unlock your ipad when you close and open the ipad cover). I don't have an ipad cover.
Display & Brightness -> Auto-Lock = Never (because I want to lock the screen myself).
I'm looking for a shortcut or gesture whatever to lock display with passcode when I want to lock it, something I can do with any android tablet. Right now I have to change the Require Passcode every time by hand to Immediately and back to 1 hour or restart it! Restart is the only quick shortcut that works.