Currently, the only way to see what changes a user has made from the UI is to go through the page history and see who edited it in the past and what changes he made.
Also, if your questions are regarding Sitefinity 3.x, not 4.x, please post them in the 3.x section of the forum. Thanks in advance.
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items