I roughly draw the design on a piece of clear gift wrap that I get at the dollar store. I use a permanent or Sharpie marker to make the outline sketch. I also print out a part of the quilt pattern in black and white and doodle a few ideas their first.
Here is a closer shot of the printed pattern. Not so sure about what I have, so it's back to the doodling part. I hope you can see my sketch okay. The left side is just some angled lines a little harder to see.
A closer view of the clear gift wrap I use dry erase markers to audition the quilting patterns before I make a decision. The good part about the giftwrap and dry erase markers is they just wipe right off, with a dry paper towel if you don't like what you have. As you can see I don't have patterns on it yet.
After a little playing I have a few choices. Although I am still playing around, and may not use any of these at all.
If you try this and like a design you've come up with. Just remember the dry erase markers wipe off easy on your hands so be very careful near your quilt top. I don't place these on or near my top as I'm afraid of getting marks on my top I may not be able to get rid of. You can trace the final design on tracing paper using a permanent marker and use that as a template with a lightbox to mark your quilt top with the appropriate marking tools.