A mini blog all about this incredibly useful and easy to use foot.
The Brother adjustable Bias Binder Foot
Insert the edge of the fabric you want binding into the tape in the guide - use an awl if necessary.
Test that the needle is in the right position and that it won't catch on the foot itself . Then simply start sewing, making sure that the fabric stays in place inside the binding. When you get to the end simply remove your work by raising the presser foot and pulling the fabric gently backwards.
The Hong Kong or Bound seam - the traditional way
Stitch your binding to the seam allowance matching the edges as above.
Trim the seam allowance to 1/4" making sure that you do not cut the binding. Press.
Fold and pin the binding behind the seam allowance. "Stitch in the ditch" making sure that the binding underneath is stitched down.