How to save as .pdf

This is maybe the easiest thing ever. Only thing you have to do is download CutePDF (GOOGLE IT)
Download and install it.

Go to file > print > choose printer and choose cutepdf.

Then the program will "print" and then you can save your papercraft as .pdf

Personally I think that downloading the free pepkura viewer is more handy. It shows you a layout and lets you roll your mouse over the tabs to find out which side they link to. You can also rotate the 3D image of the fully assembled product, and click on a part to see where it goes in relation to the assembled project. Pepekua has never given me any problems, and it doesn't change any settings on your computer, or try to download unessential software or malware.

If you plan on doing more than one project in a pepekura format, you should use the viewer (which you can print the layouts from).

However, if you don't do much, or don't plan to do much papercraft, you should probably seek other methods of printing it out, such as the cutepdf software listed in the topic.

No: He's talking about Pepakura Designer; after you design a model, you save it as a .pdo, then open it with viewer, and then print it as a .pdf.