I'm not entirely sure what you're asking, but I'll see if I can help you. Please try to use punctuation, it makes it alot easier to understand what you're trying to ask. Here's a screenshot from Pep v.3 that shows where the scaling tool is.
If you are instead referring to building the pep, then I would recommend checking out some of the excellent tutorials in the pepakura thread. They can be found in the stickies section of the forum.
Ugh... Guys Im not a noob Ok I have been on this sight longer than you EliteRouge. I have made plenty of pep files. I just need to know if the new version of pep changed the scaling or if it needs a new way to scale thats all. If anyone has recently made FS HD Helm that would be great to message me how to scale it correctly and I have asked FS some tima ago and did his exact things he told me and the pieces came to small so if any can help that would be great is not please keep your personal baggings you have directed to me to yourself. Thanks.
Okay, let's keep this civil before the mods need to step in. To answer your question: to the best of my knowledge, the best way to scale in Pep v3.0 is to specify the build dimensions in centimeters. In v2.0, you could only specify the height, but v3.0 allows you to vary all 3 dimensions. I would have taken a look back at v2.0 but I uninstalled it when I got v3.0.