I have the Brother NX-2000, which is the same machine as the Symphony. I love it and I am sure you will too. I believe that you are looking for the wider designs. If you are, they are located in the Character/Decorative Stitch category. At the top of the touch screen there are 2 tabs-one says "Utility Stitch" and the other is "Character/Decorative Stitch". Touch that tab and it gives you more options. Then touch the 1st box on the left in the top row. It will have 12 pages of designs. Use the arrows at the bottom right of the screen to go to page 11. The larger designs start there--I believe 6-103 is the first one and they continue on to page 12.
If our manuals for the machines are the same, Chapter 4 talks about those decorative stitches. I'm sincerely hoping that this helps you!
Kathleen