Hi Nicole,

Give this code a whirl. I did a proof of concept on my end and it disables the OOTB ENTER key submission behavior in the modal, and allows me my ENTER events to fire instead.

Put this custom script in your UserWorkForm and retest your modal scenario.

<script>
pega.ui.Doc.prototype.handleModaldlgKeyPress = function(event){
  if(pega.u.d.bModalDialogOpen){
  var modaldialog = document.getElementById("modaldialog");
  var srcObj = pega.util.Event.getTarget(event);
  var elemTagName = srcObj.tagName.toUpperCase();


  /* START Disabling ENTER key event

  if (event.keyCode==13){ 
  var controlType = null;
  if(srcObj.type){
  controlType = srcObj.type.toUpperCase();
  }
  if (elemTagName == 'TEXTAREA' || elemTagName == 'A' || elemTagName == 'SELECT' || elemTagName == 'BUTTON' ||
  controlType == 'BUTTON' || controlType == 'SUBMIT' || srcObj.id == 'ModalButtonSubmit' || 
  srcObj.id =='ModalButtonCancel' || typeof(srcObj.AutoComplete)!="undefined") {
  pega.util.Event.stopPropagation(event);
  return;
  }
  var buttonObj = pega.util.Dom.getElementsById("ModalButtonSubmit",modaldialog);
  if(buttonObj){
  pega.util.Event.fireEvent(buttonObj[0],'click');
  pega.util.Event.stopPropagation(event);
  pega.util.Event.preventDefault(event);
  }
  }else 

  *END Disabling ENTER key event */

  if (event.keyCode==27){   /* If the ESC key is pressed */
  var buttonObj = pega.util.Dom.getElementsById("ModalButtonCancel",modaldialog);
  if(buttonObj){
  pega.util.Event.fireEvent(buttonObj[0],'click');
  pega.util.Event.stopPropagation(event);
  pega.util.Event.preventDefault(event);
  }
  }
  }
}
</script>