-3. Help text for the input box.
-
-### field_yesno.tpl
-
-A button that has two states *yes* or *no*. Field parameter:
-
-0. Name of the input field,
-1. Label for the button,
-2. Current value,
-3. Help text for the button
-4. if set to an array of two values, these two will be used, otherwise "off" and "on".
+3. Help text for the input box,
+4. Should be set to the translation of "Required" to mark this field as required.