Auto line (ruler) and shape tool
When you need to draw a perfect line, rectangle, circle etc.
Select / Move / Transform / Duplicate
To move, resize and rotate, change color and change tool of part of your drawing. I would suggest you take a look on NoteAlways implementation of this feature as well. Also not a specific tool, just draw a circle around part of your drawing and a Hand icon appears, if you grab it, the circle will be ignored and the circled part is now selected for you to move/resize/rotate/recolor/change tool. Very natural and easy.
Smaller Brush pen / Inking
I'd like the possibility to have a smaller size for the brush pen, that even in the smallest variation is quite huge and doesn't allow to ink drawings. I know that the app is meant to be for sketches, but in an asian environment would be pretty nice the possibility to use a more Japanese style brush, that doesn't expand so much, allowing to write characters. I won't mind any of these two options: - A new brush, that retains the small size of the Brush as its biggest, and going down. - An even smaller size for the Brush. I think that a new pen with a smaller scale, but programmed exactly like the brush, would be the easiest and most effective solution.
Tool docks per document
It would be cool to have tool docks tied to a document, so for example I could create a palette for each document instead of having to share it across all documents.