Hiding Cells before printing in Excel:

Hiding a column(s) and/or row(s):

To hide a column(s), select it and press Ctrl+0.
To hide a row(s), select it and press Ctrl+9.

Hide values/text within the cells:

Change the font color to white.

To hide numbers:

Use Custom Formatting, for example, to eliminate the display of negative figures,
type "#,##0 ; ; ".

To hide areas:

Insert a white text box with clear borders; select Insert -> Text Box (in Text Group).