You can enable editing of multiple records in a record grid by using the Edit Records action. This causes a built-in dialog to appear that allows the user to specify values to be applied to all selected records. The fields that cannot be edited across the selected rows do not appear. The record editor updates only those records that are visible in the grid. For example, if there are 50000 records loaded in the record grid, but only 50 records are visible in the viewport, the record editor edits and updates only those 50 records that are visible in the viewport. 

To enable editing of multiple records in a grid, add an action button to the record grid and label it. For more information on how to edit multiple records in a grid, see Configuring actions by using an action button.

In the deployed application, the end user can edit multiple records as follows: