The Vellum workspace

Review, measure, draft, and share engineering drawings in one vector workspace.

Markup, measurement, CAD-style drafting, live collaboration, and clean export, built on a drawing engine that understands the linework in your PDFs.

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Rendering

Sharp at every zoom, fast on full sets.

Sheets open fast as a quick raster preview, then sharpen into GPU-rendered vector geometry built from each sheet's own content. Zoom from the whole sheet to a single callout and the linework holds.

Page, continuous scroll, and grid views for large sets
Split screen with independent or locked panes
PDF text search and a hover preview strip for jumping between sheets
Document night mode and hairlines-only display for dense sheets

Snapping

Snaps that land on the drawing, not near it.

Snap targets come from the PDF's own linework and from your markups, drawn with the same symbols CAD users already read.

Endpoint, midpoint, intersection, center, quadrant, perpendicular, and nearest
Extension and alignment guides, including composed horizontal and vertical locks
Snapping while you move a selection, not only while you draw
Hold Alt to place a point freely, or toggle snaps from the status bar

Measure & scale

Measure to scale, then type the exact value.

Set the drawing scale from a standard ratio or a custom equation, and every length and area reports in real-world units at the precision you choose.

Measure and Area tools with running totals and perimeters
Type lengths, angles, slopes, and roof pitch, with math such as 4*2 and feet-inches such as 3-6
Cross-unit entry: type 5m on an imperial sheet and it converts
Dimension labels with your own text that stay live as geometry, scale, or units change

A calibrated dimension reading 0.55 feet on a construction detail in Vellum

CAD-style editing

Draft on the PDF like it's CAD.

Build and fix geometry without leaving the review. Trim and extend work on the PDF's own linework too, and the object extractor turns any of it into editable entities.

Offset with distance, count, and side, for walls, setbacks, and buildable lines
Trim, extend, mirror, rotate, and fillet
Arc and bezier segments you can reshape or set to an exact radius
Object extractor and vector screenshot to reuse existing linework

Markup

Clear markups your next reviewer can read.

Clouds, callouts, text, and shapes with drafting-grade styling, so redlines communicate intent instead of adding noise.

Revision clouds, including a cloud around any selection
Linetypes that match Revit's default line patterns, plus hatch and pattern fills
Region fill that traces rooms and other regions bounded by linework
A personal library of markups you can place across a range of sheets, and vector signatures

Markup tools applied to a plan sheet in Vellum

Collaboration

One live drawing for the whole review.

Share a document by link and everyone works on the same canvas, live. There's no separate session to host.

Invite links with roles, from view-only to full editing
Live presence with cursors on every sheet and pane
Comment threads pinned to the exact spot on the drawing
Follow camera to walk the team through a sheet as you pan and zoom

Real-time collaboration on a shared canvas in Vellum

Export

Out the way it came in, or better.

Hand off a record that opens anywhere, or send the geometry straight back to CAD.

Flattened PDF for distribution, or editable PDF with markups as annotations
DXF with the drawing, the markups, or both, with presets for styles and layers
PNG images of the page or view for slides and email
PDF layer visibility and colors carry through to export

Sharing and export options for annotated drawings in Vellum

Assistant · Beta

Say what you need.
It drafts with the real tools.

The assistant runs against the open drawing using Vellum's own tools, so everything it creates is ordinary, editable geometry. Bring your own Claude account through Vellum's MCP connector for the bigger jobs. Vellum doesn't run its own model or bill you for tokens.

Plain-language commands: set the scale, measure a selection, draw a 20' circle, cloud every markup on a page
Connect your own Claude to count symbols, build takeoff quantities, and export them as CSV
Compare two sheets and cloud what changed between revisions
Draft RFIs, punch lists, and review summaries from the drawing
One instruction, one undo, with a manifest of every change and a dry-run preview
No drawing content stored: assistant memory keeps derived metadata only

The toolset

Forty-plus tools, built on vectors.

Everything you draw in Vellum is a vector entity: crisp at any zoom, snappable, editable, and exportable long after you create it.

Draw & annotate

Polyline (line, arc & bezier)
Polygon
Rectangle
Circle & ellipse
Revision cloud
Callout
Text
Pen
Highlight
Image
Vector signatures

Measure

Measure
Area
Drawing scale
Units & precision
Editable dimension labels

Precision & vector

Snap to endpoints, midpoints & intersections
Typed lengths, angles & slopes
Smart guides (beta)
Offset
Trim & extend
Mirror, rotate & fillet
Object extractor
Vector screenshot
Region fill
Text select

Style & organize

Markup layers
PDF layer control
Linetypes & arrowheads
Fill, hatch & patterns
Markup library
Document night mode

Navigate sets

Page, scroll & grid views
Split screen
PDF text search
Command palette

Collaborate

Sharing & roles
Live presence
Comments
Follow camera

Assistant (beta)

Plain-language drafting commands
Connect your own Claude
Counts & takeoff quantities
Sheet compare & revision clouding