Originally Posted by Rhonda

I will be adding it in to a future lesson but it isn't hard to do at all.

Click on layout under your quilt. when you are in layout you will see a window on the right that shows Number of Blocks / Size of Blocks and under that Sashing.

Set the sashing to the size you want it to be. The numbers represent inches. You can set the size of your blocks to 12.5" and your sashing to 3" or whatever. Then go back to layer 1 to work on your quilt with sashings.