I recently came into possessions of some bookmarks made of some wonderful book artwork and I felt the deserved to be displayed.  I wanted a display that was not obtrusive and would work for a vertical or horizonal layout with a wide enough gap to accommodate bookmarks and other card stock without pinching or scraping; so these models were created.

I found that I needed to print them solid so that they would not tip when a book mark was placed vertically.  But other than that no specific print set up should be necessary.  I use the small one for the horizonal layout so that the art work is not as covered. 

Note: The artwork in the images are from Brandon Sanderson's collection of Secret Novels:

Tress of the Emerald Sea 

The Frugal Wizard's Guidebook for Surviving Mediaeval England

Yumi and the Nightmare Painter

The Sunlit Man