What are the guides?
I’m just getting started using Lightroom (4). I picked a layout I like for a large horizontal photo, but I’m not sure what the smaller box is for. I don’t think i’ts a trim line, as it’s too small a box and would be cutting 20% of my image. What is the line for? It seems to be the same with all the layouts. And where are the trim lines? Is that the 1/8th inch gray bar along the edge?