This page will be a little different than the others. This page just lists general tips that new hexers could find useful. These are just some things to think about while hexing. A lot of these tips I've learned from Star.
Try to be careful of the eye size. If you're increasing the petz size via PWS height and fatness, watch out for how the eyes end up.
This is the default Siamese.
This is the Siamese size increased via PWS. The eyes are huge. I tend to see a lot of people just leaving it like that.
This is the eyes AND IRIS decreased. This exact size may not be the size you're wanting, but it's a lot better than the huge eyes it had before. So when hexing, just keep in mind to watch the eye size. Play around with them and see which size you prefer.