Media files toto small when published - how can I change this?

[Delcour]

My media files are almost all deeds as of birth, baptist, marriage and death. Perhaps not the proper way to add them, but it is a quick visual reminder which deeds I have or not.
When publishing I can see all the deeds, but they are too small too read well. I cannot find anywhere how to change this.
Have a look at: www.genealogie.delcour.org

thnx