To print the map, first select all 3 sections of the map by dragging your mouse across the map from top left to bottom right while keeping the left button pressed down. Release the button when the whole map and only the whole map has been selected. Try again if anything more or less than the map is included in the selection.
Press ctrl + p or select File, Print.
For the Print Range, click on the radio button for Selection.
Make any other changes that you would like.
Click on OK or Print, depending on the printer that you are using.