How do I change the thumbnail image in the VM Library when the VM is NOT running? It would be convenient to organize multiple virtual machines by their image, however, when I shut them down all the images are a blank black screen. Only when they run is an image displayed. I have searched everywhere for an answer. So far, I've seen an article that said the image is automatically updated every 10 seconds, but it's not clear if it persists after the VM is shut down.
I was going to change the Windows desktop picture of each virtual machine, so they would be instantly recognizable from the Virtual Machine Library, but so far it seems impossible.