Using Medieval Theme-Changing logo and text sizes

My logo when placed is bigger than I want in comparison to the page title text. Can either or both of these be changed in size within RW? If not, then the only adjustment possible is in the sizing of the original image.

Or, have I picked a theme that restricts me too much for what I want to do and therefore should look to another them that gives me more freedom?

Thanks in advance for help.

I hardly ever use the logo section of themes. There are other ways to place a logo wherever you like.