The following page orientations are available:
This is the natural orientation for a given media; in most cases, the short sides will be at the top and bottom.
This is a clockwise rotation of 90 degrees. Some PostScript producers get things backwards and rotate counter-clockwise so you might have to use the Seascape orientation instead.
This is a rotation of 180 degrees. Note that this is not a reflection so Upside-down may be misleading.
This is a clockwise rotation of 270 degrees. Some PostScript documents that claim to be landscape have actually been rotated by 90 degrees counter-clockwise so you might have to use this orientation to get a landscape document to appear right-side-up.