History

In order to get a history of changes for a given work item or its task open it in the edit dialog and press History tab

The list is showing what properties were changed or what actions were taken by whom and when. If more than one property was changed in the same time, the description of only the first one is shown with the ending "and n more" where n is a number of additional changes. Press a small triangle in front of this item to see description of all changes.

Initially, the most recent change is on top, but you can reverse the order by clicking the header of the Date column.

Press the Details tab to go back to the properties of the work item or the task.

Press OK or Cancel to close the dialog. If you press OK then all changes made in the Details tab will be saved.