Data sets are normally selected from the 'Select data set' dialog box, which the program displays on startup or when the New Data Set option of the "File" menu is invoked.
The first time you use a particular dataset, you must specify its 'initialization file', which is usually called intkey.ini or intkey.ink. You can enter the name of this file directly, or find it by using the 'Browse' button.
After you have finished using the dataset, you can add it to the dataset index, and when you want to use it again, you can select it from the index via the 'Select by title' list in the 'Select data set' dialog box.
In advanced mode, the 'Edit Data Set Index' dialog box can be used to add, delete and edit items in the data set index. It can also be used to change the ordering of the items in the data set index.