The Source tab defines the area of the drawing and what data types are to be printed

Source Rectangle
Manually defined rectangle - Allows the user to enter values into the Xmin, Xmax, Ymin, and Ymax fields to specify the portion of the data file that is to be printed. These values are entered as X,Y position on the data file starting from absolute 0,0 point in the lower left corner of the drawing (provided that the entire drawing template has not been moved in the X,Y space).

The Block Rectangle - If a rectangular block has been defined, the Xmin, Xmax, Ymin, and Ymax values will be set to the extents of the block.

Visible screen area - The portion of the data file that is currently displayed on the screen will be printed.

Entire data file - All elements in the data file will be printed.

Include data types
The assorted check boxes control wether or not a category will be printed. If an item is checked it will be printed, otherwise not.