The history window displays a list of past coding sessions for the project, and allows you to add previously-coded interviews back into the coding queue. It is reached by clicking history in the coding view menu.
If you are logged in as a supervisor, you will see details of sessions for all coding agents who have worked on the project. This allows you to audit the work of the agents. If you are logged in as a standard agent, only your own sessions will be shown.

The following control is available:
Get interviews: Retrieves all of the interviews that were coded in the selected sessions, so that they can be re-coded. Note that you can select multiple sessions by using the ctrl and shift keys in combination with the mouse. The interviews are added to the set of interviews that are awaiting coding. An open answer that has been coded earlier will have a coding history; this is shown in the answer history window.
The answer history window shows the details of any coding that has been carried out to a specific answer. For example:

In this example, the first codes applied to this answer were 02 and 17. In the second session, the code 18 has been added. If you hold the mouse pointer over a code, a tool-tip will appear, showing the caption for that code.