This is a sketching tool for quickly generating profile/block drafts for weaving (and not a replacement for full drafting software).
It was built for sketching double-weave block so it currently only supports 2 blocks — A and B.
The custom fields support strings of A and B, or shorthand with letters and numbers to make longer stretches (e.g. A5 instead of AAAAA).
The weft custom fields also support C and D in the string to represent rows with both light or both dark on the top layer.
Built by Allison Connell, with thanks to Vera Van De Seyp and Richard Lehmann for pointing me in the right directions.