I use a baseline grid for magazine layout. I have a specific layer I use for solid backgrounds. When I need to check how things are aligning with the grid, I always have to turn off that layer, which slows down my workflow. Is there a way to specify that layer to be below the grid at all times? I know I can uncheck "Grids in Back" in Preferences, but then there are lines all over everything, which is too much.
If it's currently not possible, then this is a feature request. 😉
You could, for the time being, create your own grid on top of your background layer.
If you use actual lines instead of guides you can set them to non-printing and they will be visible on top of the background, disappear behind objects on higher layers, and not show in Preview mode or output.