BricsCAD Model Space Plotting to Scale: Beginner Workflow
BricsCAD can plot directly from Model Space, but the workflow is less forgiving than a Layout. You must deliberately choose the plot area, paper and plot scale.
Beginner takeaway: Use Model Space plotting for simple or legacy drawings; for repeatable sheet production, prefer Layouts and Page Setups.
What you need to understand first
Model Space plotting asks the Print dialog to map drawing units directly to paper units. A small mistake in units, plot area or Fit settings can produce a convincing but wrong-scale sheet.
- Model Space can be plotted through the same Print dialog.
- The plot area can be windowed or otherwise selected depending on the job.
- Shade plot settings are relevant to Model Space and disabled for paper-space Layout printing.
Related guides: How to Plot a BricsCAD Layout at 1:1 Without Changing Viewport Scale, CAD Plot Scale: Metric, Architectural & Engineering, and Metric Drawing Plots at an Imperial Scale or Vice Versa.
Step-by-step workflow
Step 1 — Confirm drawing units
Where: Model Space and project standard
Do this: Know whether one drawing unit represents mm, inches, feet or another unit.
Check: Your intended paper scale can be expressed correctly.
Step 2 — Define the sheet area
Where: PLOT > Plot area
Do this: Choose the intended Window or other appropriate area rather than accidental extents.
Check: Only the intended geometry is inside Preview.
Step 3 — Choose real paper
Where: Printer/Plotter > Paper size
Do this: Select the physical or PDF sheet size.
Check: The sheet proportions are correct.
Step 4 — Set the exact plot scale
Where: Plot scale
Do this: Enter the required drawing-to-paper relationship; leave Fit off for scale-critical work.
Check: The scale field shows the intended ratio/units.
Step 5 — Preview and verify
Where: Preview > output
Do this: Measure a known dimension on the PDF/hardcopy.
Check: The result is physically measurable at the required scale.
What usually goes wrong
| What you see | Likely layer | First check |
|---|---|---|
| Output is tiny | Unit/scale mismatch | Confirm model units and plot scale. |
| Extra objects change output | Extents plot area | Use a controlled Window or clean geometry. |
| Sheet is centered incorrectly | Plot offset | Center or set deliberate offset. |
| Scale changes between prints | Manual dialog edits | Save a Page Setup or move to Layout workflow. |
Practical example
A legacy detail is drawn in millimeters in Model Space and must be printed at 1:20. Select the exact drawing window, choose the final paper, set the model-to-paper scale deliberately, and verify a 1000 mm known dimension on the output instead of trusting the visual fit.
What not to do
- Do not choose Fit to Paper and then label the sheet with a scale.
- Do not assume drawing units without checking the file.
- Do not use Extents if hidden or distant objects can enlarge the plotted area.
Good office standard
For recurring issued sheets, convert the workflow to paper-space Layouts. Keep Model Space plotting for controlled exceptions and include a measured verification step.
Quick verification before you move on
- Use one representative drawing or sheet, not a production batch.
- Verify page size, orientation and a known dimension.
- Compare Preview/PDF with the physical output when a printer is involved.
- Save the setting or set only after the result is repeatable.
Official references
Frequently asked questions
Is Model Space plotting wrong?
No. It can be valid, but it requires more deliberate control of area and scale than a prepared Layout.
Can I use Fit to Paper?
Only for reference output where measured scale does not matter.
What should I measure after plotting?
Choose one known geometry length that produces a simple expected paper measurement at the intended scale.
Explore more in BricsCAD Printing & Plotting Guide.