Altering font size with on Berlin Theme

I'm working on a website using the Berlin theme in The website it geared towards the community - especially seniors.

Is it possible to enlarge the font size on the tabs and in the metadata? I have been able to increase the size on simple pages by altering the font in Word.

It is not possible to adjust the font size on themes.

Also, in the future, please direct all questions to the support form that is available from the documentation: