I didn't know your perpurse well.I guess that you maybe want to change the
size of a cell.So, you can do it like this:
1)select the cell that you want to operator
2)select the menu "format" -> "Row"->"Height...", you can set the value to
it's double in the dialog(eg.14.25 -> 28.5) poped
3)select the menu "format" -> "Column"->"Width...", you can set the value
to it's double in the dialog(eg.8.38-> 16.76) poped
I hope this will helpful to you.