Love the app, use it all the time. I find though that if I am lying down or reclining on the couch I keep tilting the screen just to far and it keeps switching between portrait and landscape mode. It would be nice to have a feature to lock the view mode so you can hold the screen at whatever angle is comfortable.

This already exists under Tools, Options, Allow Rotation: OFF.

Can it be locked in the landscape mode?

I've never tried it, but I don't think so.

There is "another" program that has a little padlock appear that can be touched to lock or unlock even in landscape.

But if this feature would mess up the Mantis program flow then I vote just leave it alone. Mantis works great.