I am not sure if this is to difficult to implement, but it would be nice to have option to select WHICH PAGE to use as thumbnail. Currently, the Onyx software generates a thumbnail from the first page of the file. The vast majority of the books I have have blank or non-descript pages as the first page.
In this way, my library has many thumbnails with blank white pages. Google books were one example. The first page is a blank page. The cover/title page can be 6-12 pages in.
I imagine a menu option, while the book is open, for “SET AS LIBRARY THUMBNAIL” or something like that.
In this way, opening the library I coyld see all of the thumbnails with the Title Page, or Cover page, making it much easier to quickly identify the book I’m looking for.
This would also allow for a much more aesthetically pleasing library view.