First, I would strongly suggest that you switch from
Turtle to
Tiger. TIger handles the thumbnails better, handles videos better, handles audio better, and so on. Development of Turtle is pretty much at an end.
To alter the font characteristics of the album description, go to
Turtle > Advanced > CSS and enter, for example:
#main header .description {font-size: 22px;}
A pointer to the previous page?
What previous page? This is a one-page album. It doesn't know how the visitor got there. But if you want it to display an "up" arrow to some other place on your website, just enter the URL and tooltip text under
Album > Settings > Pages > Link to homepage (this is true in almost every skin).