We can change javascript key value to modify following script to trigger on any key (e.g. if change (code == 9) you can add new row with Tab key)
$(document).ready(function () { $("#MyGrid").on("keyup", "tr", function (e) { var code = (e.keyCode ? e.keyCode : e.which); var td = $(e.target).closest('td'); if (code == 13) { var tdIndex = td.index(); if (tdIndex == 3) { var grid = $("#MyGrid").data("kendoGrid"); grid.addRow(); } } }); });