When you create a DTM library, a history becomes
  associated with that library. Whenever you initiate
  an operation that alters the library, DTM logs the
  operation and its associated remark into the history.

  You can view history entries and add and delete remarks
  from the history.

1  –  vue_history

  To display the history records, perform the following
  steps:

  1. Pull down the View menu.

  2. Choose the History menu item.

2  –  remark

  To add a remark to the history, perform one of the
  following actions:

  o  Enter text in remark fields (usually part of a
     dialog box for DTM operations). DTM logs the text
     you enter and the operation.

  o  Log information about an unusual event using the
     Create History dialog box, as follows:

     -   Pull down the Maintenance menu.

     -   Choose the Create menu item and the History...
         submenu item.

3  –  del_history

  To delete a specified range of history entries from the
  history, perform the following steps:

  1. Pull down the Maintenance menu.

  2. Choose the Delete menu item and the History...
     submenu item.