In Document Library Pro you can choose how many documents appear on each page of the library, and set the total number of documents the library will display. You control both from the settings and design page for your library.
Documents per page
This setting controls how many rows show on each page of the library before a visitor moves to the next page. The default is 25 documents. You can set it lower, for example 10, to show fewer per page, or choose to show every document on a single page.
Document limit
The document limit sets the largest number of documents the library will display in total. The default is 500.
Warning: setting a very high limit can slow the page down if you have a large number of documents, so increase it only as far as you need.