ContextCleaner: see every entry in the Windows 11 right-click menu, and which app added it — on the Microsoft Store.

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Guided workflow variation

Red was removed. Blue was added.Gray stayed the same.

An overlay shows a whole revision at a glance, once the two plots line up. Drawing Revision Delta registers each pair first, then lets you switch between Overlay, Blink, and Side by side without leaving the page.

Choose Compare selected, read the red and blue overlay, flip to Blink or Side by side when a change needs a second look, and step through the clouds.

Pay once. Own it forever.

One-time purchase on the Microsoft Store · No subscription · Instant install

Get it from Microsoft

Buy through the Microsoft Store—instant install, automatic updates, and a Microsoft receipt for easy expensing. No account needed on our site, and no subscription on Store purchases.

Full Drawing Revision Delta overview
One-time purchase No telemetry Local-first

windows 11 · sheets paired by number · drawings opened read-only · nothing uploads

If this sounds like your week

An overlay only works when the sheets line up.

Two plots of one drawing seldom sit in precisely the same spot. A different plotter, a new PDF driver, or a scanner nudges the image a few points, turns it a fraction of a degree, or shrinks it slightly. Stack them as they are and every line doubles, so genuine edits hide among thousands of false fringes.

Where tooling usually breaks

Registering pages by hand, pair after pair, eats the afternoon.

Manual registration means picking matching points on both pages, judging the result, and starting over when the ghosting stays. Repeat that for every reissued page and the overlay stops saving time. Worse, a page that is nearly registered looks altered all over, and the one real edit is buried in color.

Where Drawing Revision Delta lands

Aligned first, then overlaid.

Drawing Revision Delta fits each pair for shift, rotation, and scale, then corrects locally for the slight stretch that plotters and scanners add. The overlay that follows shows what differs. Switch to Blink to toggle between revisions every half second, or Side by side to read both, and use the change list to jump between edits.

Pay once. Own it forever.

One-time purchase on the Microsoft Store · No subscription · Instant install

Get it from Microsoft

Buy through the Microsoft Store—instant install, automatic updates, and a Microsoft receipt for easy expensing. No account needed on our site, and no subscription on Store purchases.

Learn more about Drawing Revision Delta

windows 11 · sheets paired by number · drawings opened read-only · nothing uploads

What you get

Feature highlights

Whole sets paired by sheet number

pick a folder or files for each revision, as one combined PDF, a file per sheet, or scans in TIFF, PNG, JPEG, and BMP, and sheets are matched by the number in each title block, read from the PDF text or with the text recognition built into Windows.

Changed sheets ranked

Compare all gives every sheet its number of changes, share of change, and text edits, sorts the most changed first, and lists the sheets that are new or removed.

Revision clouds around every change

every change is clouded and numbered in the change list, including changes nobody clouded on the drawing, and Fade unchanged shows exactly what moved.

Text edits in plain words

notes, dimensions, and schedules are compared word by word from the PDF text, so an edit reads “2x6” → “2x8”, even when only one character changed.

Aligned before it compares

each pair is lined up for shift, rotation, and scale and corrected locally for plotter and scanner stretch, then shown in Overlay, Blink, or Side by side.

A report and a clouded set, nothing uploaded

export a PDF change report with a SHA-256 hash of every compared file, the revised sheets with editable cloud markups, CSV files, and PNG snapshots, all on your PC.

Especially when

  • Find which sheets changed between a bid set and an addendum or conformed set without flipping through both PDFs sheet by sheet
  • Catch changes that were never clouded on a reissued drawing, including one-word edits to notes, schedules, and dimensions
  • Overlay two revisions of a sheet that were plotted at a different offset or scale, without lining them up by hand
  • Send the field or the bid file a clouded set and a change report without uploading the drawings to an online service

Who benefits

Real-world scenarios

A re-plotted mechanical sheet

The engineer re-plotted the mechanical plan for the addendum from a different workstation. The new PDF sits a few points off and very slightly smaller than the bid version of the same sheet.

Drawing Revision Delta aligns the pair before comparing. The alignment figures read align ok, scale 0.9980, and shift 5.0, −4.0 pt, and the overlay shows the rerouted duct in red and blue instead of a doubled drawing.

A dense change that needs a second look

In a crowded corner of a floor plan, red and blue overlap so closely that it is hard to tell which room tag moved where and which one is new.

Blink alternates the two revisions every half second in the same spot, so the moved tag visibly jumps. Side by side then shows the earlier and later sheet next to each other, zoomed with Fit and the plus and minus buttons.

A scanned record drawing against a new PDF

The earlier revision exists only as a scan, and the later one is a clean PDF from the architect. The scan carries no resolution information and sits at a slight skew.

The scan is scaled to the paired sheet automatically, aligned for rotation and stretch, and overlaid on the PDF. Differences show in red and blue, and Ignore small differences quiets the speckle a scan adds.

Deep dive

Reading an overlay comparison of two PDF drawings

The colors. In Overlay, red marks content that is only in the earlier revision, so it was removed; blue marks content only in the later revision, so it was added; gray is what both share. Content under the title block mask is drawn in light gray and left out of the count. The legend in the side panel repeats this for every sheet.

Why alignment comes first. An overlay of two sheets that are a few points apart shows every line twice. Drawing Revision Delta fits each pair for shift, rotation, and scale, then measures the drawing in a grid of patches and corrects the slight stretch and shear that different plotters and scanners introduce. The side panel shows the result, for example align ok, scale 0.9980, rot 0.001°, shift 5.0, −4.0 pt, with the resolution, the share of change, and the number of text edits.

Overlay, Blink, and Side by side. Overlay puts both revisions in one image. Blink shows one revision, then the other, every half second, which makes a moved tag or a shifted wall jump. Side by side places the earlier and later sheet next to each other, scrolling and zooming together, for reading notes in context. Fit and the plus and minus buttons set the zoom in every mode.

Fade unchanged. Turn it on and the gray drawing lightens, leaving the red and blue edits at full strength, so even a busy sheet reads clearly.

Clouds and the change list. Clouds around changes draws a revision cloud around each group of nearby changes, labeled to match the list: R4, R5, or R16–R19. Each entry shows the pixels removed and added, the position on the sheet in points, and any text edit, such as “2x6” → “2x8”. Next and previous step through them.

Resolution and sensitivity. Compare at 150 DPI, or 200 DPI for fine detail. Sensitivity runs from Fine: report small edits, through Standard sensitivity, to Ignore small differences, which quiets line-weight noise when the two issues came from different PDF drivers.

The whole set, not one pair. Compare all runs the same alignment and overlay on every pair in the set and ranks them by how much changed, so the overlays you open first are the ones with the most to read.

Keeping the overlay. Choose folder and export saves a PNG of each overlay and each change region, named by pair, sheet, and region, alongside the PDF change report, the clouded set, and two CSV files.

How it is built

Built to compare the drawings themselves, on your PC.

Aligned, then compared

Each pair is fitted for shift, rotation, and scale and corrected locally for plotter and scanner stretch, so the clouds mark what changed, whether or not the drawing was clouded.

Nothing uploads

It runs in the Windows app sandbox with no declared capabilities and no network code. No account, no sign-in, no telemetry, and scanned title blocks are read with Windows text recognition on the PC.

Drawings opened read-only

The sets you compare are only read. Every export is a new file, and the clouded set copies each revised sheet unchanged, with the clouds added as editable PDF markups.

Head-to-head

How Drawing Revision Delta compares

Feature Drawing Revision Delta Manual overlay in a PDF tool Printed sheets on a light table
Alignment Automatic: shift, rotation, scale, and local stretch Points picked by hand for each pair Sheets shuffled by hand
Views Overlay, Blink, and Side by side Overlay, depending on the tool Overlay
Changes listed Numbered list with next and previous, and text edits in words Found by eye Found by eye
Whole set in one pass Yes, every pair compared with Compare all One pair at a time One sheet at a time
Title block noise Masked with one click Read past by eye Read past by eye
Record of the result PDF report, clouded set, CSV files, and PNG snapshots A saved overlay PDF in some tools Notes on paper

FAQ

Straight answers—no glossary dump

What do red and blue mean in a drawing overlay?

In Drawing Revision Delta, red is content found only in the earlier revision, which means it was removed, and blue is content found only in the later revision, which means it was added. Gray is the drawing both revisions share, and light gray marks the masked title block. Fade unchanged lightens the gray so the red and blue stand out.

Can I overlay sheets plotted at different scales or offsets?

Yes. Each pair is aligned for shift, rotation, and scale before the overlay is drawn, then corrected locally for plotter and scanner stretch. A scan with no resolution information is scaled to the paired sheet automatically. The alignment figures for each pair are shown in the side panel and printed in the change report.

What is the difference between Overlay, Blink, and Side by side?

Overlay shows both revisions in one image, colored red, blue, and gray. Blink alternates between the earlier and the later sheet every half second in the same place, so moved items jump. Side by side shows the two sheets next to each other, scrolling and zooming together. All three keep the change list and the zoom controls, and Overlay and Blink carry the revision clouds.

What happens to my original drawing files?

They stay exactly as they were. Drawing Revision Delta opens the drawings you pick for reading only and writes every export as a new file, in the folder you choose or under the name you type. The clouded set copies each revised sheet into a new PDF and adds the clouds as markups, so the issued sheets in your project folder are never touched.

Do my drawings stay on my PC, and how do I get the app?

Yes, they stay on your PC. Drawing Revision Delta runs in the Windows app sandbox with no declared capabilities and has no network code, no account, no sign-in, and no telemetry. Scanned title blocks are read with the text recognition built into Windows, on the PC. The app is a one-time purchase in the Microsoft Store for Windows 11 on x64 and ARM64 PCs, and the Store runs a 15-day free trial of the full app.

Related pages

Two revisions of the set. Every changed sheet, found. Clouds mark what was flagged. This finds what was not. The addendum is in. Here is what it changed.

Two revisions of the set in.
Every changed sheet, clouded, out.

Drawing Revision Delta pairs the sheets by title block number, ranks the ones that changed, clouds every change, and lists edited words, then exports a PDF change report and a clouded set. Your drawings stay on your PC, and the Microsoft Store runs a 15-day free trial.

Pay once. Own it forever.

One-time purchase on the Microsoft Store · No subscription · Instant install

Get it from Microsoft

Buy through the Microsoft Store—instant install, automatic updates, and a Microsoft receipt for easy expensing. No account needed on our site, and no subscription on Store purchases.

Open full product page

Technical specifications

Technical specifications for procurement

Spec Implementation
Data Sovereignty Reads only the folders and files you pick in the Windows pickers, opened for reading only; writes the change report, clouded set, CSV files, and PNG snapshots only to the folder or file you choose; the list of recent folders stays in the app’s own local storage on this PC
Telemetry Status None; no account, no sign-in, no analytics, and no network code in the app
Core Runtime .NET 10 and WinUI 3 (Windows App SDK), packaged as MSIX and run in the Windows app sandbox (AppContainer) with no declared capabilities; pages are rendered with the PDF engine built into Windows, and scanned title blocks are read with the Windows text recognition engine
Network Requirements Fully functional offline; the package declares no capabilities, including no internet access, and the app makes no network connections
Deployment Compatibility Windows 11 (build 22000 or later), x64 and ARM64; one-time purchase in the Microsoft Store with a 15-day free trial
Inputs Two sets, each a folder or a selection of files: PDF (one combined file or one file per sheet), TIFF (multi-page), PNG, JPEG, and BMP; multi-page files are split into sheets
Pairing By the sheet number in each title block, from the PDF text or Windows text recognition, then by title or file name; pair and unpair by hand; sheets in one set only are listed as new or removed
Comparison Alignment for shift, rotation, and scale with local correction for plotter and scanner stretch; 150 or 200 DPI; Fine, Standard, or Ignore small differences sensitivity; title block mask
Review Pairs ranked most changed first with share of change and text edits; Overlay, Blink, and Side by side views; revision clouds, Fade unchanged, and a numbered change list with text edits in words
Outputs change-report.pdf with the ranked changed-sheet list and a SHA-256 hash manifest; clouded-set.pdf with editable PDF cloud markups; sheet-summary.csv; changes.csv; PNG snapshots of each overlay and change
Originals Compared drawings are opened for reading only; the clouded set copies each revised sheet unchanged into a new PDF