Hello Yuriy, 



In order to implement the requested functionality please create a replacing module for "AccountAddressDetailV2" and override "onGridDataLoaded" method in it ( It's being called after rendering). 

In this method you can retrieve a detail's grid and get the DOM element from it. You can assign your own handler on it's keydown event whcih will call  "this.deleteRecords()" after pressing the needed button. 



Here is the example for the "Delete" button in "AccountAddressDetailV2":



define("AccountAddressDetailV2", [], function() {

    return {

        entitySchemaName: "AccountAddress",

        diff: /**SCHEMA_DIFF*/ [] /**SCHEMA_DIFF*/,

        methods: {

            onGridDataLoaded: function() {

                this.callParent(arguments);

                var grid = this.getCurrentGrid();

                var wrapEl = grid.getWrapEl();

                wrapEl.on("keydown", this.onKeyDown, this);

            },

            onKeyDown: function(event) {

                if (event.keyCode === event.DELETE) {

                    this.deleteRecords();

                }

            }

        }

    };

});



Kind regards,

Roman