You may choose whether to show the whole of each page in the EscapeE 'eE' iconEscapeE window or just part of it:

Click View on the menu-bar or
hold down Ctrl and press L.
oChoose Whole Page or press Ctrl J keys to display the page at a size which fits completely into the window.
oChoose Page Width or press Ctrl K keys to display the page at a size which fits to the width of the window. Use the up/down arrow keys to scroll the length of the page.
oIf the page contains a large amount of white space, choose Printed Region or press Ctrl M keys to view only the parts of the page with items for printing.
oChoose Printed Width or press Ctrl W to display only the area of the page which contains items for printing, fitted to the width of the window. Use the up/down arrow keys to scroll the length of the area. If the printing extends beyond the area of the page on which the printer is capable of printing, the unprintable parts may be marked by a dotted rectangle – see Viewing the unprintable area.

See also Configuring the view.