Super tip but can I add my own to it, use small pin/s and pin one in the top right corner and one in the bottom left hand corner that way you don't have to worry about removing the pin.
I also love this tip as it adds to a tip I was given years ago for sewing a straight line, which has worked for me, look to where you are going to sew NOT where you are sewing, in other words look at the line on the tape NOT at the needle.