You can change many things that are not incorporated in the customized field in the program.
Go the "My Shozam Themes" Folder and find the "Theme" you want to edit and open that folder.
Then open a file named theme. There are two. Open the 'cascading style sheet document'.
To edit the size of the "short caption field", scroll to the bottom. The next to last item is "Table 1". It's font-size is set for 10px. That only changes the size of the font for the short caption in the Slideshow. I have mine changed to 20 and it is a perfect size for me. This change will reflect in every gallery you create using that theme.
If you want to make changes to an individual gallery, then find that folder in the "My Shozam Galleries".
Open your selected gallery folder, then there is a "theme" folder, and the file to edit is in that folder. It's the same cascading style sheet document file.
You can also change other font sizes and colors, banner color and file, etc. You do need to know html codes for colors. I use this http://www.ficml.org/jemimap/style/color/wheel.html
So you can change some things without having to even open the Shozam program. I have changed the music file. That is in the audio folder within the "1" folder. On a couple of occasions, I have forgotten to check the "loop" for the music and I have changed that by opening the slideshow html file with notepad and made the change there. You can correct spelling errors in that slideshow file, you can take out the text, or add the text. Very timesaving!