To browse the history of an item under version control:
Select the items you are interested in. The items may be in a working copy or repository browser.
You can select multiple items to compare their respective histories.
Switch to the timeline view by selecting View > Timeline (key equivalent ⌘3) or by clicking the timeline button in the browser view toolbar:
See Downloading and Caching Your Repository’s History for more information.
The timeline view will be displayed with the items’ histories.