The Hist. function helps you check the historical transactions that happened on a crewmember’s roster. You can access it by right-clicking the flight/activity and clicking the Hist. icon:
The Roster Transactions dialogue page opens, and it appears like this:
As you can see, you get a lot of information about the activities, as well as what type (new activity, modified, released during roster release, deleted), when it was created and by whom, and if it’s been confirmed by the crewmember on Mobile if the condition permits.
You can also search for Historical transactions by date, from the Valid From / Valid To calendars at the top.
Another way to search for Historical transactions is from the Human Resource, where you can see details of the revisions triggered on the crewmember’s roster. To do so, right-click the crewmember’s name in the Roster Gantt, and select the Revi. icon:
You will get the same information in the Revi. icon that you can find from Hist. icon. The Revi. icon also allows you to see what was the previous situation in the roster before the change.
The user right to enable the Hist. function is Roster transactions.