Percy automatically matches and groups snapshots that have the same visual change, saving you time and effort while reviewing builds.

## Criteria for matching diffs

For diffs to be matched, the following criteria must be met:

• All diffs must have the same geometry, including size but irrespective of page coordinates.

• Both the baseline snapshots and new snapshots must have the exact same underlying pixels across diffs.

• Only snapshot comparisons that have the same diff geometry and underlying pixels for each enabled width and browser will be matched.

## Approvals

When matching diffs are detected, they are grouped together at the top of your snapshot list. All matching changes can be approved with a single click, or you can expand the groupings and approve individual snapshots.

If you have questions about matching diffs, please feel free to [contact support](🔗).