$scope.gridOptions = { data: 'currentItem.itemHistory', //showFooter: true, columnDefs: [ { field: 'dateTime', displayName: 'Date Time', width: 150, resizable: true, sortable: true }, { field: 'fieldname', displayName: 'Field Name', width: 120, resizable : true, sortable: true }, { field: 'change', displayName: 'Change' }, { field: 'operator', displayName: 'Operator', resizable: true, sortable: true }, {field: 'salespoint', displayName: 'Sales Point', resizable: true, sortable: true }] //,plugins: [new ngGridFlexibleHeightPlugin()] };(I've just added risizable and sortable).
{ field: 'dateTime', displayName: 'Date Time', width: 150, resizable: true, sortable: true, cellFilter: "date: 'medium'" },