Hey! We’ll make your **PDF with embedded CAD layers** print at a **true scale** (1:100, 1/8″=1′-0″, 1:50). Quick scan:
• Source app: **AutoCAD**, **Revit**, or other CAD? Export via **DWG to PDF.pc3 / PDF/A / Bluebeam**?
• Layout details: paper size (**A1/A3/Arch D**), **viewport scale** set and **Display Locked = Yes**?
• Print path: **Adobe Acrobat/Reader**, **Bluebeam Revu**, or **printer’s driver** (Windows/Mac)? Any “Fit to page”, “Shrink oversize pages”, or **Custom Scale** toggled?

Classic CAD-to-PDF scaling trap. Three places alter scale:
1) **Layout viewport** in CAD — if the viewport is **unlocked**, a mouse scroll or zoom nudges it off **1:100**.
2) **PDF viewer** — Acrobat/Bluebeam options like **Fit**, **Shrink oversized pages**, or **Custom Scale 97–99%**.
3) **Printer driver** — options like **Scale to fit**, **Borderless adjustments**, or tray size mismatch (A1 drawing auto-squeezed to **Letter/A4**).
We’ll lock the viewport, re-plot a **vector PDF**, then force **Actual size** and the correct paper from Acrobat/Bluebeam.

Step 1 — Lock the viewport & confirm plot scale
• In **Paperspace**, select the viewport → **Properties** → set Display Locked = Yes. Confirm **Standard Scale = 1:100** (or your target).
• **PLOT** dialog: Device **DWG to PDF.pc3** (or Bluebeam PDF), **Plot area = Layout**, **Scale = 1:1** to paper, **Plot style**, **Lineweights**, and correct **paper size** (A1/A3/Arch D).
• Avoid rasterization unless needed; keep **vector PDF** so geometry measures correctly.
• Re-publish; file should report the exact page size in PDF Properties.

Step 2 — Print from Acrobat at exact scale
• File → Print → under Page Sizing & Handling choose **Size: Actual size** (older UI: **Page Scaling = None**).
• If your printer supports A-series/Arch sizes, tick **Choose paper source by PDF page size** so A1 PDFs pull the A1 tray (avoid auto-shrink to A4/Letter).
• Ensure **Custom Scale = 100%**, **Fit** unchecked, **Auto-Rotate** only if orientation mismatches, and turn off any driver “shrink/expand to fit”.
• Print a 100 mm or 10″ test dimension and verify with a ruler.

Step 3 — Revu print-to-scale & mixed page handling
• In **Revu**, use **Measure → Calibrate** on a known distance to validate the file is 1:1. If the calibration is off, your viewer/driver is scaling.
• In **Print**, set **Scale: None** (or **100%**), not **Fit to Paper**. Avoid **Reduce/Enlarge** unless intentionally scaling.
• For sets with **mixed page sizes**, enable tray selection by page size (printer feature) or print subsets by size. Revu honors page size if the device supports it.
• If a PDF was downscaled on creation, use **Page Setup** to resize pages carefully, or re-plot from CAD at the correct target size.

Layers themselves don’t change scale, but **transparency, overprints, or annotations** may force a **raster print path**, and some drivers sneak in “fit to margins”. Tips:
• In Acrobat, keep **Actual size** and disable **Choose paper source** only if your device can’t pull the right tray.
• If rendering glitches appear, try **Print as Image** (doesn’t change scale if **100%** is set).
• Best fix is to **re-export vector** from CAD with the correct **plot style**, **CTB/STB**, and page size.

• In **Acrobat**, choose **File → Print → Printer… → Preferences** and save a **Plot preset** with **Actual size**, correct tray, and **no scaling**.
• In **Revu**, create a **Print Profile** with **Scale = None (100%)** and distribute it.
• In CAD, keep **viewport locked** and template the **Page Setup** (device, paper size, plot style) so exports are consistent across the team.

Yes. In **Revit → Print**, select the exact **paper size** and **Zoom = 100%** (not “Fit to page”). Export a **vector PDF**. Then in Acrobat/Revu, use the same **Actual size** path. Mixed sheets: print by size or enable **Choose paper source by PDF page size** if your plotter supports it. Always verify with a scale bar.

Summary: For **CAD PDFs printing at the wrong scale**, lock the layout viewport, re-plot a **vector PDF** at the correct sheet size, then print from Acrobat/Revu with **Actual size (100%)** and, when supported, **Choose paper source by PDF page size**. Avoid **Fit/Reduce/Enlarge** in drivers. Need a quick setup of presets for your team? Open the chat.