How can I add fields to a custom object?

How can I add fields to a custom object?

To add a field to a custom object:

Login using an account that has 'Administrator' privileges.
Click Settings on the top-right, and select Customize Accompa from the menu.
In the resulting page, click the desired Add New Field link (listed below the desired object under "Customize Fields" section) - and follow on-screen instructions to add the custom field.