You mark your quilt and try to be accurate because if not, it will look wavy. I do stack my larger 24" rulers together every third row I mark to be sure I still lined up properly I use either a Hera marker by Clover or blue tape making tape. You roll up you quilt from the outside corner to the center and start from the center quilting, working out to the corner. As long as you have support for the quilt on you left side and behind you machine, you will have no problem. You do all four sides that way and then you are done.