Remove instructions and covers
The joining engine treats every page as a tile. Export only the pattern tile pages in the original grid order. A cover page at the beginning shifts every subsequent tile.
Choose the intended size upstream
A layered pattern may contain several sizes. Use a layer-aware editor to prepare the visible size you need, then save a flattened print copy. Keep the original for future alterations.
Understand trim versus overlap
Trim removes the same border on every edge of each page. Overlap reduces spacing between adjacent cropped tiles. Test a two-tile seam before selecting values for the whole sheet.
Establish the grid before joining
Lay out a small source PDF in thumbnail view and identify its intended row-major order: left to right across the first row, then the next row. The stitcher follows that order using the column count you supply. It cannot recognize printed tile labels or automatically solve a shuffled pattern. Reorder a copy of the PDF first if necessary.
For example, six tiles arranged in two columns produce three rows. Confirm that the upper-left, upper-right and lower-left source pages are the ones you expect before stitching all six. Use matching page sizes and upright pages. The workbench rejects mixed geometry or unsupported rotation rather than silently rotating pieces into an uncertain arrangement.
Determine whether the original file contains printer margins, overlap bands, registration marks or content extending to the page edge. Those features affect your crop and overlap choices. Start with two neighboring tiles and inspect a line that should cross their boundary. A correct seam is more useful evidence than an apparently rectangular overall page.
This product joins visible page artwork; it does not understand garment sizes or select optional PDF pattern layers. If the source provides size layers, prepare a suitable flattened copy in a PDF application before stitching. Keep the original layered pattern intact so you can return to another size or inspect marks that were deliberately hidden in the prepared copy.