YES! I remembered something about extend, but couldn't find it anywhere. That solved my problem. It might be a good idea to add that to the doc string for `org-src-block-faces`, maybe with some version note that it applies to. Thanks so much! John ----------------------------------- Professor John Kitchin (he/him/his) Doherty Hall A207F Department of Chemical Engineering Carnegie Mellon University Pittsburgh, PA 15213 412-268-7803 @johnkitchin http://kitchingroup.cheme.cmu.edu On Tue, Jun 1, 2021 at 2:52 PM Tom Gillespie wrote: > Hi John, > Are you perhaps missing the :extend t directive in the font spec? Best, > Tom > >>