Before you purchase a design, you can view the color change sheet by going to the page for that individual design, then clicking the thread spool icon on that page.

Once you've purchased a design, you can get the color change sheet by finding the design in your Downloads, then clicking on the thread spool icon next to it.

On the thread list page for each design or pack, you will see links to get a PDF version of the color change sheet (good for printing), and to download a .txt version of the color change sheet for each design (useful for importing color information into Embird or really bare-bones printing).