How you navigate depends on whether you have just clicked in a cell or are editing cell data. For example, when you click in a cell, you can press the Right Arrow to move to the next cell in the row. When you are editing data in a cell, you must press Tab to move to the next cell.
When clicking in a cell and not entering or editing cell data, to move:
Forward, backward, up, or down, press the Right Arrow, Left Arrow, Up Arrow, or Down Arrow key.
To the next cell in the column, press Enter.
To the previous cell in the column, press Shift + Enter.
When entering or editing data in cells, to move:
Forward or backward within the cell data, press the Left Arrow key or the Right Arrow key.
To the next cell in the row, press Tab or click in the next cell.
To the previous cell in the row, press Shift + Tab.
To the next cell in the column, press Enter.
To the previous cell in the column, press Shift + Enter.