Is there a preview window for rhino materials?

I’m getting no where with Rhino materials. But I’ve not given up quite yet. Right now I hoping to find a way to see what materials look like before bringing them in.

My Process:
Click Add Material > Import from Material library > Material Type Folder > material
I get a list of materials but no preview when one is selected.

There must be a way to do this?

Set the Windows Explorer view to a preview:

Or Ctrl+mousewheel in the Explorer dialog.

You need of course showing if thumbnails enabled. If you tweaked Windows UI settings for performance you may have disabled that.

Explorer is set to Preview. All other programs files/images show. .rtml files give me the message “No preview available.”

Solved. Got it. Images will not show in list view.