What are you trying to enlarge?
At least for the O+S patterns, the pattern is sort of in three parts: there are the instructions themselves (comes first), the pattern pieces intended to be printed out on your standard home printer (after the instructions), and the large-scale pages intended to be printed out on a large-format printer (usually the last page or 2-3 pages of each pattern).
You can enlarge the instructions pages by changing the printing scale, but the pattern pieces to be printed out on a standard printer on 8.5X11 paper have to be printed out at 100%. For pattern pieces that don’t fit on a single sheet of paper, there are cut lines and labels indicating which pieces should be trimmed and taped together. So for an O+S garment front, for example, you’ll probably tape together 4-6 separately printed sheets, depending on how long the garment is.
The large-scale format page is the one to use if you have access to a big printer, and it will only print correctly on a large printer. AFAIK, there’s no way to print out the single (or few) sheet pattern as tiles – when I’ve forgotten to omit it from the end of my print, I just get a useless page.
Edit: I missed that you said Cinema Dress – so as an adult pattern, the front might be three pages wide instead of 2, and the skirt pieces might be 3-4 pages long on their own. I love PDF patterns for children’s clothing, but for adult clothing, I try to find a large format printer to print the large pattern pages! I’ve got access to one at work, and a (now closed, sigh) local sewing shop had one and would print out patterns.
This reply was modified 1 year ago by Enbee.