Thank you for the answer. I was beginning to suspect as much. Now I'm wondering if I can: Place a character token on the GM layer with the image as its token art—and minimize that image to one grid square. Have a macro that brings the token to the Map or Object layer and restores it to its full size (I'd have to store the image's pixel dimensions somewhere, maybe in the bars.) and centers it on the screen. Another button that dismisses the image back to its minimized size on the GM layer. As I'm thinking about it, it seems reasonably slick — but also maybe a little fragile. There's no way for a player to select the desired token on the GM layer, so I might have to have a button for each image, or have the button summon a chat menu which presents the 6-8 choices I'm picturing. I'd have to put the GM-layer tokens on each page, which is a little annoying, but it might be do-able for my map-light campaign.