TTThumbsViewController / TTPhotoView - Change Caption Size?

I am working with Three20's PhotoTest2Controller (TTThumbsViewControll开发者_如何学Cer). When I click a thumbnail and open the image (TTPhotoView?), how can I increase the size of the caption area? I need to be able to display more than 6 lines.

The caption uses a default TTStyle to render itself (see source, line 57) so all you have to do is register a stylesheet, and override the method photoCaption so that TTSTYLE(photoCaption) uses your method instead of the one found in the TTDefaultStylesheet