Why is the infoblock property not displayed in Bitrix?

Question

1C-Bitrix

Hello everybody!
In a cycle I writeforeach ($arResult['ITEMS'] as $key => $arItem)

echo $arItem['DISPLAY_PROPERTIES']['ATT_OLDPRICE']['DISPLAY_VALUE'];

to display the infoblock property - ATT_OLDPRICE. tried changing DISPLAY_VALUE to just VALUE - doesn't work.
A little higher in the code echo $arItem['DISPLAY_PROPERTIES']['AKCIA']['NAME']; - share and other properties. What could be the snag?

Answer 1

In the component settings, you must specify the properties involved in the selection for the detailed page and for the list of elements.
Or use instead of DISPLAY_PROPERTIES PROPERTIES and instead of DISPLAY_VALUE VALUE