I had already figured that out and edited my previous reply with that info. I didn’t expect you to reply so quickly so I edited my reply thinking I would be finished before you saw it. I am just now seeing your reply. I will paste my fully edited reply here:
Well, I thought I did, but maybe I didn’t. The forced restart procedure for an iPad without a Home button like mine (I still miss having a Home button) says to quickly press and release the volume up button, then quickly press and release the volume down button, then press and hold the top button until the Apple logo appears. I tried it many times now, and the logo never appears. I’m pressing and releasing the volume buttons as fast as I can, but my fingers are clumsy and maybe I can’t do it fast enough. I don’t know. 🤷🏻
UPDATE: Somehow I found an official Apple support page that said press volume up first. Since I operate my iPad in landscape orientation, that’s the button farthest from the top button. But the link you provided said to press the button closest to the top button first. When I did that, I was successful in forcing a restart. But there are still no Movie Preview or Disable Preview menu items under … or on the two arrows button menu.
I also tried unlocking orientation and changing to portrait mode. The menus didn’t change. I didn’t really think they would—just grasping at straws. I keep orientation locked because it would toggle between portrait and landscape when I moved my iPad, and it made me dizzy—I have a form of vertigo.
I don’t have to upgrade Photos manually, do I? I assume it upgrades when I upgrade the OS. I mean, this movie preview stuff appeared when I upgraded to iPadOS 18.3.1, so the Photos app obviously updated with the OS…
Also, you said you remembered the Preview menu items being present in 18.3.1 even though you were at 18.3.2. But you thought I was talking about iOS then, not iPadOS. As I said originally, I am at iPadOS 18.3.1. Maybe I need to upgrade to iPadOS 18.3.2 before taking up any more of your time on this?