JAMS keeps a complete revision history for all Jobs, Sequences, and other objects. The Audit Trail button in the Job Properties will display the Jobs Revision History, allows for comparisons to previous versions, and to revert back to any previous versions.
Audit Trail information for other JAMS objects may be Queried from the Audit View.
How to utilize the "Change Comment" or a timeline ? (I felt like i asked it before)
@MaryAnn, the Change Comment field is not currently implemented. We are looking to add this in the future. We do not have an ETA on when it is available.