Currently, it appears that only 500 (or so) entries can be listed from a table, such as Funds, Campaigns, or even Custom Fields, when working with lists. This requires that a user type in the specific field they are looking for after a certain point.
It would be nice to have a toggle (even if it is every time) to be able to "show more", which would load the rest of the fields to be viewed. This way, we can toggle on and off whether or not a field can be viewed, and search the entire list - not just 500.