Procore overlays two versions of the same drawing, coloring removed content red and added content blue, and can email a comparison PDF for a whole set at once. Per Procore's own support page, drawings of different sizes cannot be compared, and the tool works on one drawing number at a time — it does not check that drawing against its schedule, specification, or another discipline's sheet.
What Procore's support page describes
Per Procore's own tutorial (accessed 2026-09-14), selecting "Compare to this version" on a drawing's version history "overlaps the two drawings and highlights the changes": items removed between the old and new version appear in red, and items added to the new version appear in blue. Comparing a full set of revisions emails a PDF with each drawing compared to its own previous version.
The same page states plainly that "drawings of different sizes cannot be compared." Viewing and comparing drawings needs at least Read Only permission on the project's Drawings tool, and at least two uploaded versions of the same drawing.
A missing opening does not live on one drawing number
Procore's overlay compares two versions of the same drawing. It has no stated way to compare drawing number A against drawing number B — which is exactly where a cross-discipline gap shows up.
In Groundbook's published mixed-use review, the missing-opening finding was a sump shown in the mechanical/plumbing drawings with no matching opening in the corresponding structural slab and footing drawing. Both drawings could be individually unchanged from their own previous versions — a same-drawing overlay would show nothing — while still disagreeing with each other.
Use the overlay for version control, and something else for coordination
Procore's compare tool is a fast way to confirm exactly what changed on one drawing between issues, which is useful for routing a response and confirming a revision landed. For whether that drawing still agrees with a different discipline's sheet or its own specification section, use cross-discipline coordination or drawings vs. specifications review.
If your field team also runs Fieldwire
Fieldwire's own sheet-compare feature works differently from Procore's — it is built to overlay two different plans against each other for coordination, not only two versions of one plan. See how Fieldwire's Compare Plans feature works, and where it stops.