How do I set up a document in Calc to print in landscape form

Document entered as portrait and I think my problem is that I am unable to move the page breaks.
I have altered the command from portrait to landscape in the drop down box this does not appear to work.

Any help gratefully received. Ro.

Hello,
may be i did not get you right but Format -> Page -> Tab "Page" and Field "Orientation" change to “landscape”. This will define your sheet in landscape mode.