[split] Color annotations?

[Anton]

Edit KG: I split this thread from one about f29r, but there was no elegant way to do this, hence the somewhat abrupt beginning.

I think this folio has been discussed, must have been lost in the "Coventry incident". I don't remember the details though.

Nice observation of "r", don't remember it from before.

Don't think it stands for "radix", it's pointless to mark a root as a root when everyone plainly sees that it's a root.