Selects the data area where the cursor or selection is located.
A data area is a contiguous block of cells around the current cell or range, delimited by empty rows and columns.
To select the data area, the cursor must be inside or adjacent to a block of data.
If the cursor is not adjacent to a block of data, the selection returns the cell where the cursor is placed.
If the cell is adjacent to two blocks of data, the selection is the rectangular area that wraps the two blocks of data.