Not only can they be used for creating guidelines for lettering, they can also come in handy any time large numbers of parallel lines are needed. I just used mine to shingle the exterior of Grendel's back porch, and it was quicker and less painful than either my rolling straightedge or my drafting table's straightedge alone.

That also means that here it is, Sunday morning, and Tuesday's Cat-Tharsis is all ready to scan and post. This is probably the most "together" I've been with regard to the strip since it's inception. Of course, it helps that I have a bunch of scripts in the bag, and I'm not doing my writing on the fly.