I used the seam guide attachment for my serger but you can just as easily use a pad of post its or painters tape to mark the spot. So first you need to get one of these items. For those who are not sure what your seam guide attachment looks like, here is a picture.
|Seam guide attachment with screws that attach the seam guide to the machine|
|see how my raw edge is aligned exactly where the two needles with the thread will hit?|
|here is the post-it pad aligned|
|here is the seam guide aligned and screwed down|
|fabric flipped over and aligned with the guide|
|me stitching my faux hem|
Here is a picture of my finished "hem".
|wrong side--see how the edges are caught perfectly? No need to go back and trim!|
|Front side...perfect coverstitch!|
Piece of cake right? I can't believe I was ever just eyeballing it! This method makes it so much easier! I hope this helps. Let me know if you have any questions...I'll be happy to clarify!