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Add extra options to the field options box for your field. This hook is called inside of a table.
add_action( 'frm_field_options_form', 'my_field_options_form', 10, 3 ); function my_field_options_form( $field, $display, $values )
- 'field' (array)
- 'display' (array) - A list of field options that should be shown for the current field.
- 'values' (array) - Details about the form.