Yes there is!
Go to JOOMLA INSTALL/templates/ezwebhosting/css/template.css
line 1348:
.jdGallery .slideInfoZone h2 {
-webkit-border-radius: 300px;
-moz-border-radius: 300px;
border-radius: 300px;
text-shadow: none !important;
font-size: 3.7em !important;
font-weight: 300 !important;
height: 300px;
line-height: 54px;
padding: 67px !important;
text-align: center;
width: 300px;
you'll want to change the height and width options.
Also note, with the responsive layer enabled, you will also have to change the values for the file s5_responsive.css
specifically, line 73:
@media screen and (max-width: 1325px)
....
.jdGallery .slideInfoZone h2 {
font-size: 2.2em !important;
height: 200px;
line-height: 37px;
padding: 60px !important;
width: 200px;
within s5_responsive.css there are several (max-width: ....) conditions that you will need to search for.
These are obviously applied to the smaller screens to keep the size of the circle in check when the image slider reducing in size.
I tried to change all of these to a much nicer %width, which reduces in proportion to the screen width... but it's not as simple as it sounds.
Let me know if that helps