Deleting unwanted Cells

Is there anyway where you can delete unwanted cells that you do not want in a work book.

An example is if you want say rows 1 to 20 and Columns A to E and you only want those cells to appear in the work book. In other words I don't want the rows from 21 to the end and columns F to the end to appear.

You can hide (mask) columns or rows: selct them right-clic then select
"hide"

to un-hide them: select the columns before and after and in the menu
choose un-hide

thanks, that is what I was looking for.

ok, great