Hi @rkemp,
Not presently. You can see here for more of an explanation around why TinyMCE is limited: Adding images to announcements in OJS 3.3 - Tiny MCE - #4 by rcgillis
I think there are some plans for improving some of the abilities around TinyMCE within OJS for our upcoming version though: Update TinyMCE · Issue #6578 · pkp/pkp-lib · GitHub - @NateWr - you might be able to speak to this and whether or not this would cover this scenario?
-Roger
PKP Team