Not only that, but the head (the cross-end) of the square fits neatly over the edge of the drywall and is long enough that you can be assured that the square is perfectly in place. The t-square is by far your largest investment in DIY drywalling, but there is no acceptable substitute. You had better just suck it up and enjoy it. Your consolation here is that the drywall T-square can be used for things other than drywalling.
Some drywall T-squares, such as those manufactured by Empire, have a head that adjusts to 30, 45, 60, and 75 degrees. While not crucial to have an adjustable cross-bar, but it sure is nice.
