bold font in Musescore 3 guitar fretboard diagram

Hello Forum:

Is there a way to use bold font in Musescore 3 guitar fretboard diagrams?

I used the search bar in Musescore, and while i found superb documentation for guitar fretboard diagrams, there was not a description on how to use bold font.

Specifically, it would be SO nice to have the capability to use bold for:
* fret numbers, and
* the X's and O'x that indictate open and closed strings.

In a "normal score of 6 lines per 11 inch page, these 2 things get printed so small that they are nearly invisible to 71 year old eyes.

Yes, I know that the fretboard diagram itself can be increased in size, making both of these more visible... but in normal sized score sheets alot of detail is packed into an 11 inch score sheet, and increasing the fretboard size itself can yield a messy looking sheet, and more difficult to read.

Thanks to you, especially to the creators of Musecore. What a wonderful tool!!
Old Jimma From the Old Country