In the lower left corner of the Validators editor, click
the New (+) button.
In the Name field of the
New form, specify a name for the new Validator object.
Click OK.
The new Validator name displays in the list on the left panel, and the
Properties panel on the right
displays the property sheet for the new Validator object.
In the property sheet, specify the properties and attributes to be used by the
new Validator object.