Disappointing - Not so easy

I know how to read charts. I thought I knew how to design them. This app makes me second guess that knowledge. I wanted to use it primarily to create my own knitted charts but have not been able to do so since I purchased it. Ive tried to import my own pictures, which it does, but I cannot resize the canvas and chart size to my specifications. The on-line manual is not helpful. Please improve your instructions and include a step by step tutorial to help the novice because this is not working for me and I categorize myself as an intermediate knitter.

Snugglypooh about StitchSketch