1. Looked in the manual, but didn't find answer
http://manual.calibre-ebook.com/viewer.html
2. There are 3 icons that don't appear to do anything, at least when I click. According to the tooltips they are
[Back], [Forward], and [Load a theme]
There is a [Next Page] and [Previous Page] which 'read' the book, so I can't figure what the [Back] and [Next] are supposed to do.
When I click [Load a theme] I thought I'd get a FileOpen dialog, but nothing happens
What is the purpose of the 3 buttons?
Thanks