• page_down scrolls the grid, page, or both so that the currently visible bottom most row because the top most; sets focus to the cell in the same column in the new top most row
• page_up opposite of page_down
• home/end moves focus to the first/last cell in the row that contains focus; does nothing if already there
• ctrl+home/end moves focus to the first/last cell in the first/last row of the current page; does nothing if already there
  - [ ] [alphanumeric keys] if a cell contains an input widget, places focus on the first one, and inserts key
• Add a keyboard shortcuts reference somewhere in the datagrid itself

Spec reference: Keyboard Interaction For Data Grids