Doodle with Finger

Design the default drawing canvas for a mobile doodle app. The screen starts blank, with the canvas taking most of the view and the drawing mode obvious without explanation.

The user should be able to sketch with a finger or stylus immediately. The UI needs to support freehand input while keeping tools close enough to reach one-handed, without crowding the canvas.

Treat the blank state as the main state, not a placeholder. The interface should feel ready for the first stroke, with clear affordances for pen choice, color, undo, and clearing.

This is a gesture-first mobile surface, so the drawing area, tool placement, and touch feedback all matter. The challenge is to make the canvas feel open and expressive while still giving the user control over what they draw.

Make the first stroke feel safe: show a subtle active drawing affordance near the canvas edge, but keep the center fully open.