PDF is how AutoCAD drawings get shared — with clients, contractors, and print shops who don’t have CAD. But “plot to PDF” is also where a lot of avoidable problems show up: wrong scale, washed-out colours, missing line weights, huge file sizes. Do it methodically and you’ll get a clean, correctly scaled PDF every time. Here’s the reliable workflow.

Use the built-in PDF plotter

You don’t need third-party software. AutoCAD ships with the DWG To PDF.pc3 plotter, and recent versions add quality presets — “AutoCAD PDF (General Documentation)” at 1200 dpi and “AutoCAD PDF (High Quality Print)” at 2400 dpi. Open the Plot dialog with PLOT (Ctrl+P) and select one of these from the printer list. You can also use the Export → PDF panel on the Output tab for batch-friendly options.

The step-by-step, error-free workflow

  1. Plot from a Layout, not Model space wherever possible. Your viewport already holds the correct scale, so you simply plot the sheet at 1:1.
  2. Open Plot (Ctrl+P) and choose DWG To PDF.pc3 as the plotter.
  3. Set the paper size to match your title block (A1, ARCH D, etc.).
  4. Plot area = Layout (when plotting a sheet). Tick “Center the plot” and “Fit to paper” only if you’re producing a non-scaled check print — never for a to-scale drawing.
  5. Set the scale to 1:1 for a layout (the viewport handles the drawing scale). If you must plot directly from Model space, set the real scale here — plot scale = paper size ÷ drawing size (e.g. 297 mm of A4 showing 29,700 mm of model = 1:100).
  6. Assign a plot style table (CTB/STB). This is critical — without one, AutoCAD plots screen colours, which usually look terrible on paper. Your CTB controls printed line weights and screening.
  7. Preview with Plot Preview, then plot and choose where to save the PDF.

A clean plot-to-PDF, in order DWG ToPDF.pc3 Paper size+ Layout Scale 1:1(layout) CTB/STBplot style Preview& plot →→→→

Save it as a Page Setup — the biggest time-saver

Rather than configuring the Plot dialog every time, store all of it in a named Page Setup. Open the Page Setup Manager (PAGESETUP), click New, name it descriptively (e.g. A1-PDF-Mono), and save the printer, paper size, plot area, scale, and plot style together. Apply it to any layout with one click. Better still, save your standard page setups in your template (.dwt) so every new drawing starts ready — and use Import in the Page Setup Manager to share consistent settings across your team.

Common problems and fixes

  • “It’s not to scale.” Usually a viewer issue: in Acrobat’s print dialog, make sure “Actual size” (100%) is selected, not “Fit” — Acrobat often shrinks to ~98% by default, throwing off the scale. Also confirm you plotted the layout at 1:1 with the viewport scale set and locked.
  • Colours look wrong / lines too thin. You’re missing a CTB, or the CTB line-weight mappings don’t match your conventions. Assign and check it.
  • Hatches or transparency don’t appear. Enable “Plot transparency” in the Plot dialog.
  • Huge PDF files. Raster content (attached images, gradients) is the culprit. Lower the raster DPI in the DWG To PDF properties, compress images before attaching, or turn off unneeded raster layers.
  • Shifted geometry or odd hatch colours. In Export → PDF → Options, adjust the Merge Control and precision settings.

Invest ten minutes in a solid page setup and plot style table once, and plotting to PDF becomes a one-click, predictable step for the rest of the project.

Part of our AutoCAD & drafting series. Next: xrefs in AutoCAD — best practices.