Lots of fun, easy to get started – Sketch Tree Pro - My Art Pad Review

Is it possible to save projects to come back to later? I can’t find a save button anywhere. First digital art app and I found it very intuitive and easy to use. I found that I would occasionally accidentally make dots or lines when zooming or switching layers. Is there anything I’m doing wrong or do I just need to be more careful? Is there a user manual?
Review by ShreksBoulder on Sketch Tree Pro - My Art Pad.