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Compare Drawings (iOS)

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To compare two drawings in the Drawings tool so that the differences are highlighted.

Things to Consider

  • Required User Permissions: 'Read-only' and above on the project's Drawings tool.
  • Tip! Swipe up to view older revisions of this drawing


  1. Navigate to the project's Drawings tool on an iOS device.
  2. Tap the drawing you would like to view.
  3. Tap the Compare Drawings icon.

    view drawings horizontal.jpg

  4. View the comparison of the two most recent drawing revisions of the sheet you selected. 
    Note: Lines added will be highlighted in blue. Lines removed will be highlighted in red.
  5. To compare different revisions, tap the header that displays the different sheet revisions. 
  6. Tap Compare with different drawing
  7. Select the drawings you would like to compare.

Troubleshooting (realign sheets)

If your drawing appears to have every line highlighted in red and blue, your PDFs may have been shifted a few pixels when the revision was created (see example below).


compare drawings bad.jpg


  1. To realign drawings, tap the header that displays the different sheet revisions.
  2. Tap Realign
  3. Drag or use the arrows to align the sheets until you align your drawings.
  4. Click Done.
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