I have a column in Calibre that lists where I purchased a book from. Is it possible to filter out more than one criteria? I seem to be able to only filter out one at a time. For example if I want to filter out books from Amazon K4PC and imported from Kindle, it will only let me do one or the other.
Or if say I want to see books bought from B&N and Kobo and Smashwords, etc., same thing I can only see one at a time.
Am I doing something wrong?