I'm working on an Eagles View Pattern for a Waistcoat, and I just sewed the 2 back pieces together and it says to press open the seam. Does this mean I Iron the seam from the right side?
You need to iron it so that the seam "flaps" fold back upon themselves. The right side seam folds to the right, and the left side folds to the left. They lay flat on the inside, and won't be seen when the garment is finished.