[foosion]

Originally Posted by DiapDealer

I don't use the calibre version much, so I forget the particulars, but the functionality should be the same between that and Sigil. If you need to add a tag, that's a little more of a manual process. Perhaps one of the calibre users can walk you through it. I'd have to install calibre to remember the details.

Originally Posted by foosion

I figured it out. Click customize, then at the bottom add to the list of html attributes to search for.

Oops - that's to add an attribute, but not to add a tag. To make it easy to add a tag the plugin would have to be modified to have a line similar to the add attribute feature. Otherwise, as Terisa writes, edit the plugin itself.