I think the easiest way to split a design is by color. On your snowman, I would probably have split it after the green scarf. In Embird, I run the sew simulator and that will usually give me a good idea where to split. If you can separate all colors on your software and then re-group them into 2 or 3 sections. I have split designs into several sections when I had a smaller hoop. Did the Wolf-Eagle (from Emb. Library) jacket back on a 5x7 hoop. I think I had six different splits. Check to see if there are tutorials for your software, Hugs.