Originally Posted by theducks
I think what you are asking for is called "Saved Searches" (upper right)
Once made, you can use them as implied or to Restrict view: which allows you to still search within the restricted view.
Management can be done in the Tag view window
I will confess I haven't found a use yet for saved searches. I don't actually want to restrict my view of the library in normal day to day usage when I am adding new books and editing metadata. When you are trying to ensure no duplicates etc you can't use a restricted view.
What I do want to do is be able to build lists of series or authors that I intend to "revisit" in future. There is no meaningful "subset" that I could restrict my view to which reduces the authors down to a manageable level, given my favourite authors list for instance could include any one of them?
I understand I "could" construct my lists as a saved search by building monstrous "or" expressions, however this is pretty nasty to maintain and I think the "user categories" feature is better suited? Or am I missing something?