I use LR extensively for culling. The iPad form factor + Apple Pencil make it really great as a culling device for my workflow. Sometimes though the viewable area when in the normal view makes the image a bit too small on the 11" iPad. If it were possible to have just a subtle flag/rating indicator in the corner of a photo when in full screen, when in the rating mode, that would be SO helpful and enable me to stay in the full screen view during the culling session. Here's an example of what I'm talking about. First photo is the normal view in the rating mode as it is. Second photo is what I propose it looks like when in full screen mode.