How to Use Multiple Viewport Scales on One AutoCAD Layout
One Layout can contain several viewports at different scales. Set each viewport independently, lock each one, and make sure annotations are designed to display correctly at those different scales.
Start here — what you are going to do
Your goal: Place a plan and one or more enlarged details on the same sheet at different controlled scales.
Where to start: Open a prepared Layout with enough room for multiple viewports.
Beginner rule: Change one scale-related setting at a time. After setting a viewport or plot scale, use Preview and verify one known measurement before trusting the final sheet.
Step by step — follow this in AutoCAD
Step 1 — Create the viewports
Where: Layout tab > Layout Viewports / MVIEW, or copy an existing viewport.
Do this: Create one viewport for each required view.
Check: Each viewport has its own border.
Step 2 — Set the main view scale
Where: Select main viewport > Viewport Scale.
Do this: Choose the main plan scale, for example 1:100.
Check: Main plan fits its area.
Step 3 — Set the detail scale
Where: Select detail viewport > Viewport Scale.
Do this: Choose a larger scale such as 1:20 or 1:50.
Check: Detail is enlarged independently.
Step 4 — Pan each view
Where: Activate each viewport one at a time > PAN.
Do this: Frame the correct model area without zooming.
Check: Each viewport still reports its intended scale.
Step 5 — Check annotation behavior
Where: Select viewport / annotative objects.
Do this: Confirm annotation scale and visibility for each view.
Check: Text and dimensions are readable in both viewports.
Step 6 — Lock every production viewport
Where: Viewport Properties > Display Locked = Yes.
Do this: Protect each approved view.
Check: The mixed-scale sheet is stable.
Step 7 — Preview the whole sheet
Where: Ctrl+P > Preview.
Do this: Check hierarchy, titles and scale notes for every viewport.
Check: All views appear at the intended relative sizes.
Beginner example
An A1 sheet contains a floor plan at 1:100 and a restroom detail at 1:20. Each viewport gets its own scale and lock, while the Layout itself still plots as the physical A1 sheet.
Understand what AutoCAD is doing
Each viewport is an independent window
Changing one viewport scale does not require changing the others.
Larger scale means more detail and less area
A 1:20 detail shows a smaller real-world region than a 1:100 plan in a similarly sized viewport.
Annotation needs its own check
Annotative text and dimensions can behave differently when the same model appears at multiple viewport scales.
Useful next guides: Set a Viewport Scale · Annotation Scale vs Viewport Scale in AutoCAD · LTSCALE / PSLTSCALE / MSLTSCALE · Create a Viewport
Common problems and what to check first
| What you see | What may be causing it | Check this first |
|---|---|---|
| Both viewports change together | Wrong viewport was selected or copied workflow is unclear | Select each border individually and read its Standard Scale. |
| Detail text is missing | Annotative object lacks the detail scale | Add/check the required annotation scale. |
| Dashed lines differ between views | Linetype scale settings differ by viewport context | Review PSLTSCALE/MSLTSCALE/LTSCALE. |
| One viewport gets zoomed accidentally | It was left unlocked | Lock every approved production viewport. |
When you need a more repeatable workflow
For repeatable Layouts, use named standard scales, lock every approved production viewport, and keep one measured PDF as a reference. If several users work on the same templates, standardize the scale list and Page Setup so nobody has to rebuild the sheet by trial and error.
Official Autodesk references
Interface labels can vary slightly by AutoCAD release and workspace. These Autodesk pages are the primary references for the workflow above.
Frequently asked questions
Can two viewports show the same model area at different scales?
Yes. Each viewport can display its own magnification and framing.
Does the Layout need a different plot scale for each viewport?
No. The Layout normally outputs at 1:1; viewport scales control the model views.
How should I label the scales?
Use clear scale notes tied to each view/detail and verify them against the actual viewport scale.
Explore more in Viewport Scale in AutoCAD & CAD.