Why drawing sets end up in pieces
A plan set is rarely produced as one file. Civil, landscape, and architectural sheets come from different offices; a resubmittal replaces three sheets; the cover sheet is made in another program; details arrive late. Reviewers, contractors, and permit portals all want one PDF in sheet order. Merging is a few seconds of work, as long as the tool doesn't damage the drawings on the way.
How to merge drawing sets into one PDF
- Drop in the PDFs, or choose them. You can add more at any time.
- Check each file's sheet count in the list, then use the arrows to put the files in order: cover sheet first, then by discipline.
- Choose Merge. The combined PDF downloads with every sheet from every file, in the order shown.
To reorder or drop individual sheets, extract or split the sets first, then merge the pieces.
What a merge should not change
Some PDF tools merge by printing every page again, which can turn thin lines into a blur, replace fonts, or rasterize hatching. This one copies each page as it is: the content streams, fonts, and images move into the new file byte for byte. Sheet sizes and orientations stay as they were, so a 24 x 36 civil sheet and an 11 x 17 detail sheet sit happily in the same set.
PDF layers in a merged set
CAD-exported sheets often carry layers. Each drawing is tagged with its layers, but the list of layers belongs to the document rather than the pages, and a plain page copy leaves it behind, so the layers panel disappears. Here the list comes along too, and when more than one file has layers, each file's are grouped under its file name. Open the merged set in the PDF layer viewer to check them.
Before you send the set
- Flip through the merged PDF once and confirm the sheet index on the cover matches the order.
- Check that sideways sheets read correctly; fix any with the rotate tool before merging.
- Name the file the way the portal or client expects, with the project and the submittal date.
Where merging comes up
- Assembling a submittal from civil, landscape, and architectural sets produced by different offices.
- Adding a late cover sheet or a revised detail sheet to a set that has already been issued.
- Combining scanned field sketches with the CAD sheets they refer to, for one record set.
- Bringing addenda together so bidders get one file instead of five.
Try it with the two sample sets: the ten civil sheets and the two architectural sheets of a mixed-use plan set, each with its own PDF layers.