Ihor, thank you for this. Jo, what actual version of org are you using? I'm using a fairly recent version (as of last week) so maybe what you want to do is possible now but was not earlier?
-- : Eric S Fraga via Emacs 28.0.60, Org release_9.5-93-gd87250 : Latest paper written in org: https://arxiv.org/abs/2106.05096
