You can change the size of a fence by dragging its border, but fences do not "maximize" and "minimize" like windows, kirk5.
You can sort fence contents by name, etc. Fences do not, however "zoom".
You can put a file on the desktop and create a fence (a folder portal) that will allow the display of the folders you determine, and put one of these on a "page" and make them the size of your desktop. Creating a "folder portal" (one per page) sounds to me like what you basically wish to do.
You can also put each regular fence on its own "page" and make the fence size the size of the desktop itself.