Screencast:Setup - Fields- Show "Last Edited By"
ZohoCRM: Setup - Fields- Show "Last Edited By" As an organization grows and the logic evolves around processes it is very important to be able to know who changed what and why and when. A last edited by/ versioning history is very important and should be part of every field edit with a place for owners/ admins to get warnings AND a place for the editor to make notes as to why the changes were necessary.
http://www.screencast-o-matic.com/watch/cijV15UR
dgd