Hi Andrew

I'm seriously grateful for this! I've been tinkering around and digesting the code and understand the local-formatting issue. In fact, I discovered that the formatting issue is evident in the "old way" I was doing it, i.e. when manually restarting the numbering in a paragraph. Considering that any local paragraph formatting should be relatively limited anyway - as this is a script format with "layout rules" after all - your numbering system saves way more legwork than the minor issues it causes.

One or two observations:

Formatting wasn't always affected. Sometimes I would italicise a couple of lines and it stayed in place when toggling the numbering on and off, but if I italicised the whole paragraph (even ignoring the paragraph marker) then the formatting would reset. Individual words with local formatting (which is the much more likely scenario) never seem to be affected.

So what's going on there?