When you receive feedback from multiple participants, each in a different copy of the original PDF file, you may find it helpful to merge these comments into a single PDF file for easier review.

Merging comments is a two step process:

1. Export comments from each commented file
2. Import all comments to collate them into a single PDF file

To export comments from a commented file:

1. With a commented PDF file open, on the Review tab, in the Comments group, click the arrow next to Migrate, and then select Export Comments. The Export Comments dialog appears.
2. Specify a unique filename and location for the exported comments, and then click Save
3. Repeat steps 1 and 2 for every commented file

To import comments from multiple reviewers into a single PDF:

1. With the original PDF open, on the Review tab, in the Comments group, click the arrow next to Migrate, and then select Import Comments. The Import Comments dialog appears.
2. Select a comment file to import, and then click Open
3. Repeat steps 1 and 2 for every comment file