
Pin the rows at each seam and the ends. Make sure to get the seams lined up together as exact as you can.

This close-up view shows that my green line is not even where the four corners meet in the center. I now have a choice...leave it and be unhappy later or pick it out and fix it.

I choose to pick it out. I only picked out as far as I needed to...nothing else on that line was wrong. I pinned it together and looked at it several times before I was happy that the line was meeting correctly.

After sewing it again I had a line that was straight. Yea!