Whiteboard
The full editor: pens, markers, highlighters, three kinds of eraser, shapes, text, selection with move, resize and rotate, layers, pan and zoom. Everything here is built from the public API.
Empty drawing canvas.
Selection has real handles: drag inside the box to move, the corners and edges to resize, the circle above it
to rotate. Manipulation only changes each element's transform, so the vector data is never rewritten and undo
restores it exactly. Arrow keys nudge, Shift makes larger steps, Delete removes. A locked layer is skipped by
selection and erasing, and saving writes the whole board, layers included, as a file you can open again.