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Guided workflow variation

A cloud around every change,without drawing one.

Clouding a revised set by hand means finding each edit first. This app compares the two issues and saves the later sheets as a new PDF with an editable cloud markup around every change it found, ready to forward.

Compare the two revisions, choose Save clouded set, and forward one PDF of the revised sheets with a cloud around every change, each one editable.

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

Clouding a set by hand starts with finding every edit.

A subcontractor forwards reissued pages to the field, an architect issues a revision, a reviewer marks up a resubmittal. Each needs scalloped outlines around what moved, and tracing them manually means first spotting every edit by eye, then outlining each one in a markup program, page after page.

Where tooling usually breaks

Hand-drawn clouds inherit every miss.

When the review was done by eye, the outlines are only as complete as that look. An outline around the wrong area, or one never traced, sends the crew or the next reviewer straight past the edit. And outlines burned into a flattened copy cannot be adjusted when someone asks to tighten one up.

Where Drawing Revision Delta lands

Clouds placed from the comparison itself.

Drawing Revision Delta clouds each group of nearby changes with a margin of about an eighth of an inch, labels it to match the change list, such as R4 or R16–R19, and writes the clouds as PDF polygon cloud annotations on copies of the revised sheets. Those keep their vector content, page size, and rotation, and new sheets carry a note.

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 subcontractor forwarding sheets to the field

The foreman needs the reissued sheets from Addendum 2 with every change marked, not the whole set and not a memo describing the changes in words.

The project manager compares the bid set with the addendum and chooses Save clouded set. One PDF of the reissued sheets goes to the field, each change inside a red cloud labeled to match the change report.

Adjusting clouds before a set goes out

A project architect wants a clouded revision set to issue, but a few clouds mark edits the office does not need to call out, such as a corrected drafting typo.

Because the clouds are PDF cloud markups rather than drawn content, they can be moved or deleted in a PDF markup tool before the set goes out. The sheets underneath are the revised sheets, unchanged.

The full revised set in one PDF

The owner wants the whole revised set as one PDF, clouded where it changed, so nobody has to merge files or hunt for the sheets that were reissued.

Turn on Include sheets with no visible change before Save clouded set. Every sheet of the later revision goes into the PDF in its own order, with clouds on the changed ones, and sheets new in this issue carry a note.

Deep dive

How the clouded set is built, and what each cloud carries

Clouds come from the comparison. Drawing Revision Delta aligns each pair of sheets and compares them, then places its clouds around what it found. Nothing depends on the clouds already drawn on the sheets, so changes the drafter left unclouded get a cloud too.

One cloud per group of nearby changes. Changes close together share a cloud, labeled with the range it covers, such as R16–R19, while a change on its own gets its own label, such as R4. Each cloud sits about an eighth of an inch outside the changed line work, and its label is printed above it, upright on the sheet as displayed.

What each cloud says. Every cloud carries a comment that names its label, the pixels removed and added, and the earlier file and page it was compared with. When text changed inside it, the comment adds the edit in words, such as “2x6” → “2x8”. The markup's author is Drawing Revision Delta and its subject is Cloud.

Editable, not burned in. The clouds are PDF polygon annotations of the cloud type, with a cloudy border and their own appearance, so PDF viewers show them and markup tools list them as clouds. Move one, delete one, or add your own comments before you forward the set.

The sheets underneath. Each revised sheet is copied from its source PDF unchanged: vector content, page size, and rotation stay as issued. Scans and image sheets are placed as images in the same PDF, so a mixed set still comes out as one file.

Sheets new in this issue. A sheet that appears only in the later revision has nothing to compare against, so it carries a note in its top-left corner: New sheet: not in the earlier set.

Which sheets go in. By default the clouded set holds the sheets that changed and the sheets that are new, in the later revision's own order. Turn on Include sheets with no visible change to write the whole revised set.

Two ways to save it. Choose folder and export writes clouded-set.pdf together with change-report.pdf, sheet-summary.csv, changes.csv, and PNG snapshots. Save clouded set writes the clouded PDF alone, under a name you choose in the Save As dialog.

Check before you forward. In the Compare view, Clouds around changes shows the same clouds over the overlay. Mask title block keeps date and revision-letter edits from being clouded, and the sensitivity setting decides how small an edit earns a cloud.

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 Clouding by hand in a markup tool
Finding the changes From an aligned comparison of both revisions By eye, before the first cloud
Clouds placed Around every change found, across the whole set, in one export One at a time, sheet by sheet
Edits nobody noticed Clouded, because the clouds come from the drawings themselves Clouded once someone spots them
What each cloud says A label such as R7 and a comment naming the change and any text edit Whatever was typed
The revised sheets Copied unchanged into a new PDF Marked up in place unless saved as a copy

FAQ

Straight answers—no glossary dump

How do I add revision clouds to a revised PDF set automatically?

Pick the earlier revision as Set A and the revised set as Set B in Drawing Revision Delta, check the pairs, and choose Compare all. Then open Export and choose Save clouded set, or Choose folder and export for the report and CSV files as well. The revised sheets are written to a new PDF with a cloud around every change.

Can the clouds be edited after export?

Yes. Every cloud is a PDF cloud markup added on top of the sheet, not line work drawn into it, so it can be moved or deleted in a PDF markup tool. Each one carries a label such as R7, a comment naming the change and any text edit, Drawing Revision Delta as its author, and Cloud as its subject.

Which sheets are included in the clouded set?

The sheets of the later revision that changed, plus any sheet that is new in that revision, which carries a note saying so, all in the later set's own order. Turn on Include sheets with no visible change and the whole revised set goes into the PDF, with clouds on the sheets that changed.

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

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

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