Hi Ziad,

You could try something like the below. You will probably want to play around with it to suit your requirements. But this will disable all input elements on the form and only allow the submit / approve / reject buttons.

$(document).ready(function(){
    
  $('.signSignatureBtn').click(function(){
    var selection = 1;
    setInterval(function() {
      if (selection == 1){
        var sigLength = $('.ManagerSignature img').length;
       //console.log(sigLength);
       // console.log('changed sig field');
        if (sigLength == 1){
            $('Body input').attr('disabled',true);
            $('.action-btn').attr('disabled', false);
          }
      }
  selection = 0;
    },500);
    
  });
  
});

Edit: The part you will need is only really the signSignatureBtn click part and setting / disabling the disabled attribute on required elements. I had the setInterval in there as I was playing around with getting the signature length.

Edit2: Added check to signature field so that change only happens on specific signature field. Set css of desired signature field to "ManagerSignature: