To Edit a Field

Do one of the following:

In the Text Editor window, right-click the field you want to edit, and choose Edit Field from the pop-up menu.

or
In the Text Editor window, double-click the field you want to edit.

The Fields Editor dialog opens with the field's underlying property selected.
Do one of the following:

To change the field's underlying property, select the property.

or
To change the formatting of the field's underlying property, use the control in the right-hand column of the selected property.
When done, click OK.
The field is updated in the Text Editor window.