Originally Posted by KimS
After reading this I'm a bit confused. Do you use the darning foot to FMQ and the walking foot when stitching in the ditch?
Yes, that's generally it ....
darning foot to FMQ with feed dogs down
and
walking foot for SITD and other line quilting with feed dogs up
Though as you have read here ... it's not a hard and fast rule, and you do what works best for you!