To manage clients choose Tools | Manage Clients from the main screen menu. The following screen will appear:

This screen will allow you to view information on each client. You can
also use this form to add or edit client information. To view
information on a client, select the client from the client pull-down
list. To edit information on the currently listed client press the Edit
button. The fields will now allow changes to them and the Save button
will become enabled. After making your changes press the Save button.
To add a new client, press the New button. All the fields will become
blank allowing you to enter new information. When you are finished
entering information press the Save button to add the new client. To
delete the current client click the Delete button.
Fields Explained
The Client ID field is a unique identifier for the client. Every
different client must have it's own ID. The Name field is a descriptive
name for the client. The Rate field indicates the rate at which this
client is charged. The Active field indicates whether this client shows
up in the client pull-down lists.