Through the Edit History panel, you can review the sequence of edits to the current recipe by individual contributors. This panel assists in determining who made which changes and when they were made.

Edit History panel

Sets of changes are grouped by the user who performed them and listed with most recent changes at the top. 

Changes to individual transforms are listed within a set:

+The listed step was added (add operation).
-The listed step was deleted (delete operation).

Edit operations are represented by a delete operation and then an add operation.