Some of the ways I use Sketchbook Pro on my iPad. I have been playing with this program for a few months and find it a very useful tool.
This is a color study for a tattoo. I had already started coloring the tattoo. This is how I colored on a layer above the photo to get a rough idea on a color scheme. The tattoo will be more detailed but obviously this saves time.
www.matthodeltattoo.com
Location:In bed watching tv
