I'm working through the tutorial 'placement based on image colors'. When I try the 'Auto search' feature to load in the satellite images, nothing happens (in fact the first image I place manually vanishes). The bottom left box has a red line around it which seems mysterious! So I dragged in each image by hand. Then when i shift click <Set ALL> the interface just flashes and nothing happens.. UPDATE. Started a new scene and this time it worked. Still had the funny red line and had to drag the images in manually through..