I have a cell that looks like this

,---------------------------,
| . . .Marsupiala. . . |
'----------------------------'

(The commas/lines represent the walls of the cell. ignore the periods they're just there so yahoo answers doesn't mess it up)

How do I make it looks like this?:

,--------------------,
| . . Marsu- . . |
| . . . piala . . .|
'--------------------'

I tried pressing the "return" key but all it did was bring me down to the next cell.

Please Help. 10 pts to best answer :-)
My key is labeled return but that's just cuz its a mac its the same for pc-users as enter pretty much