Paint

1. Tap a circle to set a tile. Where you tap inside the circle points the tail.
2. Drag to lay a run of tiles along the stroke. Tap a laid tile to recolour it; hold and drag its circle to move it, its diamond to swing the tail.
3. Right-drag, or the hand, moves the wall. Pinch, or scroll once the wall is engaged, zooms. The painting saves itself as you go.
4. The shape button switches the brush — tile, bare circle, bare diamond. A circle plus a diamond makes a square.
5. The prismatic tile rolls a palette. The three lines hold every dial: tools, arrangements, palettes, canvas and export.
6. The brush picker, bottom left, holds the three pieces: the nuna tile, the bare circle and the bare diamond. A circle and a diamond side by side make a square.
7. Make stamp lifts a piece of the wall. Arm it, drag a box across painted tiles, and the copy follows the pointer — tap to lay it, as many times as you like. Turn and Mirror work on the copy; each laid copy is one undo.
8. A shape ID from the Shapes tab — tile letters such as ACF, or a family number such as 3·12 — typed into the stamp bar becomes the stamp. A link ending #shape=ACF opens the Wall with that shape ready.
9. New canvas clears the wall and can be undone. Save to a file keeps a wall you want to come back to; Open a file lays it back down.

B paint · F fill · E erase · S brush shape · M make stamp (then R turn · X mirror) · H hand · Z undo · 1–9 swatch · Esc leave stamping or full screen. Keys act only while the pointer is over the wall.