Yes.
if you select the cell value say 10, and press control and move the fill
handle up the cells, the value gets decremented - 9, 8, 7, 6, 5 and so on. If
you select the cell value say 10, and press control and move the fill handle
down the cells values gets incremented- 11, 12. 13, 14 and so on.
Note: If you you decrement beyond the base value - in this case assuming it
is 10 -Excel will display negative value.
Challa Prabhu