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Users commented that there are too many steps between the first choice of the technique and the beginning of drawing
Prototype
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iterations
Since GR2 we decides to put more attention to the following details:
1) user understanding of how to do initial preparations
2) steps users needs to take to find necessary technique
3) structure, design and interface of the main page
4) process of choosing level of difficulty
So we decide to refine our paper protypes according to this aims and therefore.