Auto-rotation for KOReader on Android?

I've been running KOReader on my Kobo device for a while with good success.

I just added it to my Android tablet, and I'm unable to get it to do auto-rotation. This is particularly annoying when I read in landscape mode, since the info lists always come up in portrait mode . . . .

On my Kobo, I saw some "lock" options like "Ignore accelerometer events" that don't show up in the menus when I run on Android.

I scanned the forum, but didn't see any pointers to this.

Am I missing something obvious here?

Thanks!

Dan