PDF Print Directory:    The folder where all printed files (in PDF format) will be saved by default. This can be adjusted by clicking the Change button and navigating to the desired folder.

Page Size:    Allows you to select various page sizes used by your printer, (A4) by default.

Orientation:    Used to select between Portrait and Landscape page layouts.

Width / Height:    When Page Size is set to custom, you can manually enter the page size values (in millimetres).

Open Acrobat Reader on Print:    Once you have created a PDF via Wall Charts etc. you can have the file open automatically.  Unticking this checkbox stops this action from occurring.