Great App, I just started using it and I'm really glad I found it.
I'm a little surprised that this hasn't been requested, so I guess I'll be the first to put it in the que.
1) Could you add lockable layers please? I often import an image and add annotations in different colours. (red= notes, green=dimensions, blue=comments, etc...) I then export a few different images to different people. Not everyone (eg client) needs to see the certain comments or notes so it would be nice to turn off the layer and hide them for the export. Locking the layers helps avoid moving stuff by accident.
2) Could you add letter and tabloid sized paper to your next update? I know A4 is close but it's nice to have US sizes in North America.
Thanks! This is a really great app!