Dual Viewer and Overlay
Two documents side by side, or one over the other to spot every change.
See exactly what changed
Overlay lays one revision over the other: the old one in cyan, the new one in magenta. Anything that moved or changed stands out at once.
- Auto-align, adjust colours and contrast
- Mark the differences and save them as a PDF
- Or use the Dual Viewer for side by side
Compare revisions
Dual Viewer: two revisions side by side, each pane zooms on its own.
Tools that go with it.
Dimension Inspector
Read every dimension of a drawing, vector or scanned, and edit values in place.
See how it works
Auto-number CN balloons
Place numbered balloons on all dimensions in one click, filling gaps first.
See how it works
Drawing review
ASME Y14.5 checks plus engineering consistency: revisions, sheets, gear maths, keyways, parts list, notes against views.
See how it works
Change report
What changed between revisions in words, with the CN balloons carried over.
See how it works
Product map
Parts, assemblies and 3D models linked to their drawing pages.
See how it works
Explain symbols
GD&T frames, fits, threads, finishes and notes explained in plain words.
See how it worksTry every tool, free for 3 days.
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