How to create a multiple infoblock property of file type?

Question

1C-Bitrix

Beginner user of Bitrix.
So far, I have only been able to write code to add a new file type property.
How to register so that it is immediately plural? To be able to add multiple images to it.

$arFields = Array(
"NAME" => "Upholstery colors",
"ACTIVE" => "Y",
"SORT" => "500",
"CODE" => "TEST_CATEGORY",
"PROPERTY_TYPE" => "F" ,
"IBLOCK_ID" => 28,
);

$ibp = new CIBlockProperty;
$PropID = $ibp->Add($arFields);

Answer 1

In $arFields add
"MULTIPLE" => "Y"