Notify parent

Hi all,

I have one question regarding the way that Appian works with processes and how to notify parent interfaces. 

So in my case a I have a grid field on the parent page that has a list of open document processes and for each row I'll have a edit button like the following

When clicking the edit button it loads another interface ( a dummy one for now) 

This is the new item button code for the way that I'm currently doing ( which is not working )

a!buttonArrayLayout(
    buttons: a!buttonWidget(
    label: "New item",
    icon: "plus",
    size: "SMALL",
    iconPosition: "START",
    saveInto: {
      a!save(local!selectedProcessId, null),
      a!save(
        local!currentNodeId,
        local!currentNodeId + 1
      ),
      a!save(local!isEditMode, true()),
      a!startProcess(
        processModel: cons!ADBase_DummyProcessModel,
        processParameters: { Cancel: false(), ProcessData: null },
        onSuccess: null(),
        onError: null()
      )
    },
    style: "SOLID",
    color: "ACCENT"
    ),
),

I've also created a dummy process to test

What i would like to know is how when in edition mode clicking cancel/save would notify the parent.