Altering font size with on Berlin Theme

I'm working on a website using the Berlin theme in Omeka.net. 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 Omeka.net themes.

Also, in the future, please direct all Omeka.net questions to the support form that is available from the Omeka.net documentation: http://info.omeka.net/.

Thanks!