Having just upgraded (as opposed to migrated) a 10.5.1 site to 13.1.0, my client is complaining that the font size within the RTE has increased to 16px where as it used to be 14px. This wouldn't normally be an issue apart from the fact that the client uses the RTE to layout a whole page (I know, you don't have to tell me, it's a very old site) and it's putting things out of alignment.
I can't find anywhere where I can change it. I've looked on TinyMCE's sites and can't find anything there either. Does anyone have an idea of how to reduce the size of the text in the RTE?