When you want to print a map at a certain scale and/or to fit a
certain paper size, always print from a 'Layout Window'.
You draw rectangular 'frames' in this window. Then you double-click
them to add in a map window or browser for example.
Look at the inbuilt help as follows:
Under Help > MapInfo Professional Help.
Open Introducing MapInfo Professional
Open The Basics of MapInfo Professional
Open Reviewing the Windows in MapInfo Professional
Open Displaying Data in a Layout Window
Regards,
Ross