Not exactly like Photoshop but there are guides when using the reference planes (explained in this video http://www.pixologic.com/video/video-v2-zcr.php?videoname=http://www.pixologic01.com/zclassroom/homeroom/lessons/videos/additional-videos/mp-image-reference.f4v&w=1024&h=576). If the video doesn't play you can find it…