Change the page orientation to portrait or landscape
On the File menu, click Page Setup.
Click the Page Size tab, and under Page orientation, click either Portrait or Landscape.
The drawing page orientation is set for the current page.
If the thumbnail preview shows that your drawing page orientation doesn't match your printer paper orientation, click the Print Setup tab, and under Orientation, click either Portrait or Landscape.
The printer paper orientation is set for the current page.
If the preview shows that the drawing page and the printer page orientations don't match, set them to match.