straight grain
I had wonderful Home Ec teacher who taught us how to wash, dry til damp, and then have a friend help pull the material on the diagonal, both ways until the grain was straight. Then, while the material was still damp, you would iron it to set the grain. Everything seems to lay straight after doing that. Does make the DH laugh when asked to help but then he asks me to help do things working on vehicles that make me scratch my head too.