Compare drawing revisions and overlay disciplines
Find every change between revisions without flipping between two windows, and lay disciplines over each other to see where they disagree.
What you can do
- Compare any sheet with an older version or another document: removed in red, added in blue
- Automatic alignment for re-plotted or shifted sheets, or align by two points
- Cloud every change in one step
- Compare whole sets: sheets matched by sheet number, with a report of what changed
- Overlay sheets in colour and save the result as a layered PDF
New revisions keep your markups
Upload a new revision and it becomes the current version of the document. Markups stay on their sheets, the old version stays in the history, and you can compare the two at any time.
Mark up what you find
Markups stay editable while sheets are overlaid or compared, so a clash or a change is clouded and commented the moment you see it.
More features
Markup and review
Clouds, callouts, stamps and measurements on construction PDFs in the browser, with a sortable markups list, statuses and replies.
Takeoff and estimating
Calibrate a sheet once, then measure lengths, areas, volumes and counts on PDF drawings. Room fill, symbol search, cost columns and Excel export.
Punch lists and RFIs
Pin punch items, RFIs and submittals to the drawings, add photos, assign them and track them to closed — online or offline on site.
Drawing checks
Catch common drawing-set errors before issue: sheets missing from the index, broken sheet references, tags that are not in the schedule, blank sheets and moved grid lines.
Live review sessions
Review drawings together in real time: see who is on which sheet, follow their cursors and watch markups appear as they are made.
Bring your next drawing set.
We are onboarding teams in early access. Tell us about your projects and we will set you up — or compare two drawings in your browser right now, no account needed.