Set Default Text for Task "Notes" Field?

I looked through all of the settings as well as the theme editor but have not been able to find a way to change the default font for the Notes field on/in Task records. Am I overlooking something or is this not something that can be set at this time? I can’t remember if this was the way it’s always been, but I feel like it started to default to 9pt which is hard to read after updating to v10.0.3530 (free license). I’ll also add that I made sure the zoom of the Notes field was set to “Original”. Thanks in advance!