How to Quickly Compare Changes in PDF Drawings?

Step 1: Open the Two PDF Drawings

• Open both drawings you want to compare.
• If they’re multi-page PDFs, navigate to the specific pages you need to compare.

Step 2: Click on ‘Compare Drawings’

• If multiple files are open, select the correct pages for comparison.
• Click ‘Start Compare’.

Step 3: Understand the Color Codes

• Black: Indicates content that is identical in both drawings.
• Red: Content exclusive to Drawing A.
• Green: Content exclusive to Drawing B.

Step 4: Resolve Scale or Position Issues

• PDF drawings may have different scales or positions. To fix this:
• Click ‘Set Reference Points’.
• Select two points on Drawing A that also exist on Drawing B.

Tips for Accurate Alignment:

• Choose points that are far apart to improve scale accuracy.
• Zoom in when selecting points for better precision.
• Ensure the points are selected in the same order on both drawings.

Step 5: Generate Accurate Results

Once aligned, click ‘Compare’ again to get precise results.

Step 6: Save and Share

• A new file with differences clearly marked will be created.
• You can annotate, share, or view this file in other software for further analysis