Size
Lists the paper sizes supported by the current printer.
If you select Same as printer paper size on the Page Size tab of the Page Setup dialog box, changing the paper size also changes the drawing page size.
Source
Lists paper trays, cassettes, manual feed, and other paper sources specific to the target printer.
Orientation
Specifies the paper orientation as Portrait 
Left
Specifies the distance from the left edge of the paper to the left margin.
Top
Specifies the distance from the top edge of the paper to the top margin.
Right
Specifies the distance from the right edge of the paper to the right margin.
Bottom
Specifies the distance from the bottom edge of the paper to the bottom margin.
Center horizontally
Centers a drawing that is smaller than the width of the paper between the left and right margins.
If the preview doesn't look the way you want, you might also want to use this option with the Size to fit drawing contents option on the Page Size tab.
Center vertically
Centers a drawing that is smaller than the height of the paper between the top and bottom margins or edges of the paper.
If the preview doesn't look the way you want, you might also want to use this option with the Size to fit drawing contents option on the Page Size tab.
Adjust to
Reduces or enlarges the drawing to a specified percentage. For example, to reduce a drawing to three quarters of its original size, type 75.
Fit to (sheets across by sheets down)
Fits each drawing in the print job on the number of sheets you specify across and down. Depending on the number of pages and the margins you specify, the drawing is enlarged or reduced. If the pages across and down are not proportional to the drawing's dimensions, only those sheets needed to maintain the drawing's proportions are used.
Printer
Opens a dialog box where you can select the printer you want to use.
