Any geographers out there familiar with the more obscure bits of Excel?

 

I am trying to find the way to magnify / reduce the size of the cells you see on a spread sheet, ie effectively zoom in and out of a worksheet.  I am sure I have done this accidentally sometimes with the wheel on my mouse, but now I want to do this, can't find how (nor can out IT people).  I have windows professional opn my mcahine.

 

Many thanks for any help on this,

 

Hillary Shaw, Newport, Shrops.