As everyone else, I have "Curio Cabinet-itis" as my preferred display preference.... {currently at 7}
.... BUT, within those cabinets I found a nice little item that helps display the back rows neatly, and so they individually show above those in front of them.
These "Cabinet Organizers" are clear lucite, sturdy, and you can line them up for shelving of different lenghts. I get mine from AMAZON online, and they are about $10US with free shipping for Prime Members. Made by InterDesign, and actually made for spice racks...go figure, grin!