Currently the only way to identify layers that share a group is to choose one of the limited number of colors available for a layer, with members of the "folder" being assigned a slightly darker shade of the same color. This is better than nothing, but PLEASE implement an indented display similar to Photoshop so that's is very, very easy AT A GLANCE to see which layers are groups and which layers are the group members. With complicated projects with lots of layers, this is currently not the case.