What Is a PC3 File in AutoCAD? Beginner Guide
A PC3 is an AutoCAD plotter configuration file. It can store CAD-specific device settings, but it does not install a missing operating-system printer or network queue.
Start here — what you are going to do
Your goal: Find a PC3, inspect what it points to, and understand its dependencies.
Where to start: Layout > Ctrl+P > Printer/Plotter > Name.
Beginner rule: Follow the steps in order. Do not change several plotting settings at once. After an important change, use Preview or make one test output before continuing.
Step by step — follow this in AutoCAD
Step 1 — See PC3 entries
Where: Layout > Ctrl+P > Printer/Plotter > Name.
Do this: Look for names ending in .pc3.
Check: You can identify AutoCAD plotter configurations.
Step 2 — Open Plotter Manager
Where: Type PLOTTERMANAGER.
Do this: Open the Plotters folder.
Check: PC3 files and Add-a-Plotter are visible.
Step 3 — Open a PC3
Where: Double-click a PC3.
Do this: Do not edit yet.
Check: Plotter Configuration Editor opens.
Step 4 — Read what it points to
Where: General and Device and Document Settings.
Do this: Identify driver/device/port/media dependencies.
Check: You see that PC3 is not the physical driver itself.
Step 5 — Test before sharing
Where: Use the PC3 on the target workstation with one known-good Layout.
Do this: Check paper list and output.
Check: The configuration is actually compatible.
Step 6 — Document dependencies
Where: Record PC3, underlying device/queue/driver and any attached PMP/custom media.
Do this: Treat them as part of the plotting standard.
Check: Another computer has enough information to reproduce it.
Beginner example
You copy an office PC3 to a new workstation and it appears in AutoCAD, but plotting fails. Open the PC3 and check the underlying printer, queue or driver; the PC3 does not install that missing system device for you.
Understand what AutoCAD is doing
PC3 means AutoCAD plotter configuration
A PC3 can contain AutoCAD-specific device settings such as port/output behavior, graphics options, custom properties and paper configuration.
A PC3 can depend on a real driver or queue
If the PC3 points to a Windows system printer that does not exist on another workstation, copying the PC3 alone will not recreate the full printing environment. Compare System Printer vs PC3.
Inspect before editing
Use Plotter Manager to find PC3 files and open the Plotter Configuration Editor. Record the working setup before changing production configurations.
Useful next guides: Plotter Manager · PMP Files Explained · System Printer vs PC3 · Choose a Printer or Plotter · Printers & Plotters
Common problems and what to check first
| What you see | What may be causing it | Check this first |
|---|---|---|
| PC3 exists but will not plot | Underlying printer/driver/port is unavailable | Open the PC3 and verify what device or port it uses. |
| Custom paper disappeared | PC3/PMP/driver differs | Compare the full working configuration, including any attached PMP or custom media. |
| Works on old workstation only | Environment dependencies changed | Compare OS printer, queue name, driver and AutoCAD configuration files. |
| New plotter appears but paper is wrong | Configuration was not tested with real media | Open a known Layout, choose the new device and verify its actual paper list. |
When you need a more repeatable workflow
Once this basic method works, stop rebuilding the same settings by hand. Save the proven choices in a named Page Setup for Beginners, use a prepared Layout when the sheet is recurring, lock any production viewport, and keep one verified PDF or physical plot as a reference. For larger drawing sets, move toward Sheet Set Manager or publishing rather than repeating a manual Plot operation on every sheet.
Official Autodesk references
Menus and device-specific options can vary by AutoCAD release, workspace and configured printer. These Autodesk pages are the primary references used for the workflow above.
Frequently asked questions
Does a PC3 install my printer?
No. A PC3 configures AutoCAD plotting. If it references a system printer, that printer and driver still need to exist on the computer.
What is the difference between a PC3 and a printer driver?
The driver or system printer provides the operating-system device layer. A PC3 is an AutoCAD plotter configuration that can reference that device and store additional AutoCAD-specific settings.
Can I copy a PC3 to another computer?
Often, but the target computer still needs compatible underlying devices, drivers, queues and any dependent files. Always test the copied configuration.
When does PMP matter?
PMP becomes relevant when calibration or custom paper/media information is attached to a PC3. Many ordinary plotting problems should be checked at the device and PC3 level first.
Explore more in AutoCAD Printing & Plotting Guide.