A step-by-step guide to assembling a PDF sewing pattern: reading the assembly map, ordering pages, trimming, aligning and taping tiles for an accurate fit.
PDF sewing patterns are convenient: you download them instantly, print them at home and reprint whenever you need a fresh copy. The step that worries many sewists is putting the printed pages together. With a simple system, assembling a PDF pattern is quick, accurate and even a little satisfying.
Gather everything first so you are not hunting for tape halfway through:
Before assembling, confirm the print scale. If you are not sure how, our guide to printing a sewing pattern at actual size covers the test square in detail.
Most PDF patterns include a small diagram showing how the pages fit together. On Digital Creation patterns, the assembly map is on the cover page, and each tile is labelled with a row letter and column number: A1, A2, A3 across the first row, B1, B2, B3 across the second, and so on.
Look at the map and note how many rows and columns there are. This tells you how big the finished layout will be, so you can clear enough space.
Place all the pages on your work surface in their grid positions before trimming anything. This catches missing or duplicate pages early, and it lets you see the shape of each pattern piece emerging.
If a page is missing, reprint only that page by entering its page number in the print dialog.
Each page has a margin that the printer may not reach, plus an overlap area. A common and reliable method is to trim one vertical edge and one horizontal edge on each page, for example the right and bottom edges, and leave the other two untrimmed. The trimmed edge then sits on top of the untrimmed edge of the neighbouring page.
Some sewists prefer to trim nothing and simply fold the margin back. Either works, as long as you are consistent across the whole pattern.
This is where accuracy matters. On Digital Creation patterns, overlap the edges so that the grey triangles form complete diamonds. When the diamonds are whole and the pattern lines continue smoothly from one page to the next, the tiles are aligned.
When the layout is complete, you can cut your size directly or trace it onto separate paper. Tracing keeps the original intact, which is useful for graded patterns that contain several sizes.
Remember the line types on Digital Creation patterns: the solid line is the cutting line and the dashed line is the stitching line. Transfer the grainlines and notches as well, because they guide fabric placement and help you match seams during sewing.
Both work. Tape is faster and stronger along cutting lines; a glue stick keeps the layout flatter and is good for tracing. Many sewists use glue on the overlaps and a strip of tape on the cutting lines.
Yes. If you prefer, print the A0 copy-shop file on one large sheet, as explained in our copy shop printing guide, or use a projector file to cut directly from projected lines.
Use pattern weights or a few books to hold the pages in place, and tape the centre of each join first before working outwards.
Every Digital Creation download includes a tiled PDF with an assembly map, labelled tiles and alignment diamonds, plus an illustrated sewing instructions PDF. Create a pattern to your own measurements in the pattern builder, or see the Pricing page for download plans.