In the previous example, clicking the blue arrow highlighted and selected the entire row or column and displayed the formatting options in the tool box.
Additional functionality is supported when the blue arrows are clicked multiple times.
This expands the smart selection.
Clicking the blue arrow once highlights the row or column.
Clicking the blue arrow a second time selects the entire data range.
Clicking the blue arrow a third time unselects the range.
Clicking the arrow once highlights the row (or column).
Clicking the arrow again highlights the entire data range.