There are a lot of easy ways to change up a doll dress. This trick can be used in a number of sewing situations, but I'll start with showing you how on the reversible dress. After you see how easy it is, you may want to try it with sleeves or a collar.
You will see this is an excellent way to use scraps of fabric.
Start with two pieces of fabric that you like together.
Sew the two pieces length wise. Your goal is to create a piece of fabric large enough to cut the outside of the reversible dress pattern from.
Once you've sen them together, you may want to add trim, but you don't have to.
Sew trim along the seam you just created.
Then lay your pattern out on your piece of fabric and cut.
Next cut a lining and proceed to make the reversible dress. As I mentioned earlier this can be done with sleeves or a collar too.