Display Only Item save in Oracle Apex

 

Step-1 : 

Copy to paste this code in Page Load Dynamic Action

document.getElementById("P9_TOTAL_AMOUNT").readOnly = true;
document.getElementById("P9_DISCOUNT_AMOUNT").readOnly = true;
document.getElementById("P9_VAT_AMOUNT").readOnly = true;

Note : type not need Display Only . You can put multiple items

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If You want to Select List or Popup LOV Display Item Fixt Then Select Page and Go to Execute when Page Loads :

$('#P46_SHIPPER_COM').attr('disabled', true);

$('#P46_CONSIGNEE_COM').attr('disabled', true);