If the problem is that your finger hides the drawing, why would you not just make a &quot;normal&quot; drawing app with an offset cursor then?  This seems like an odd fix for the problem.<p>Good luck with it though. I eagerly await the day I can have a true &quot;digital sketchbook&quot; in my pocket, so I&#x27;m always interested to see people come up with new ideas in this area.