The picture below shows a Security folder and 2 sub-folders (User Profiles and Permissions & Roles). You can also notice that each sub-folder has 4 more links listed below it (in addition to the More... link). If you are wondering why 4 links and not 6 or 10 links, well, it is 4 links because this is what I want it to be.

How can you set the number of links available under a Portal folder?
Navigate to PeopleTools > Portal > Portal Utilities > System Options and update "Maximum Child Links" to 4.

Very easy to setup and it could make a big visual difference for your users.