If the Mass Update option is selected on page 1 of the Grid Wizard,
the Mass Update button will appear on the grid.
Click the Mass Update button to open the mass update widget which will enable you to specify a value for a field on any object on the Grid and apply that value to multiple records.
Fill in the values for the fields you want to mass update in the widget. Once you click on a widget field, it will turn orange indicating that the field value will be used to mass update corresponding fields in the Grid (even if the widget field value is blank). Click the Clear link next to the field to clear the widget field value and specify the field will not be mass updated in the Grid.
Apply to Selected Records by selecting one or more existing records on the Grid using the checkbox to the far left of row. You can select/deselect multiple records for a particular object by clicking the checkbox in the header row for that object or by holding the Shift key while clicking. Click the Apply to Selected Records button to apply the values to each selected row.
Apply to All Records by clicking on the Apply to All Records button. Only objects corresponding to widget fields you specified values for will be updated in the Grid.
Apply to All Records only updates the visible records currently loaded on the page. For example, 20 out of 481 records, and not the entire 481 record dataset.
Finalize your changes by clicking the Save button on the Grid.