The atlas editor in a browser: the arts of a directory, and one of them on a canvas with the palette, the tools and the frames beside it. The document is a Cauldron2D.Easel held here; the browser draws it and sends back where the pointer paints.

Mounted by Cauldron2D.Easel.Web.Router.easel/2; the session carries "dir", "tile" and, when saves should install the directory as an atlas, "atlas".

Keys

The pointer paints with the tool in hand. b brush, l line, r rectangle, R filled rectangle, f fill, e eraser; 1–9 pick a colour; h/v flip, t/T turn, arrows shift; ,/. frame before or after, a adds one, d duplicates, x drops; o onion skin, p plays; u undoes, U redoes; s saves, w saves and installs. Every one of them is also a button.