[. . . ] About this Guide - Chapter 1 Describes the information in this User Guide. Machine Defaults and Setups - Chapter 7 Gives step by step instructions on how to access machine setups and change the machine defaults. Safety Notes - Appendix A Provides safety procedures and approval certification information for the product. Use this chapter to ensure all materials being used are within specification. [. . . ] Select Temporary if you want to save fonts in the printer memory (RAM). If you choose this option, fonts are discarded when the printer is restarted. Add Fonts enables you to select and load scalable typefaces, fonts, or font support files for your printer. The button opens a dialog on which you must specify the drive/path where the files you want to load are located. If you are using more than one printer, or if you change the port your printer is on, select this button to move or copy your installed fonts to the other printer or printer port. To print a document with a watermark, you must first select the watermark from the list. All subsequent documents will print with the same watermark until you select (None) from the list. Add Type the required watermark text in the Content Text box, and select Add to create a new watermark. If you are creating several watermarks at once, you must edit the watermark text before you select Add. Delete enables you to remove a selected watermark from the list of available watermarks. Select the watermark in the list, select Delete and then OK to confirm you want to delete this watermark. CAUTION: When cleaning the WorkCentre Pro 421, do not use organic or strong chemical solvents or aerosol cleaners. Avoid supplies that are not specifically listed as approved in this documentation. Use supplies and cleaning materials only as directed in this documentation. WARNING:Do not remove the covers or guards that are fastened with screws. You cannot maintain or service any of the parts that are behind these covers and guards. Do not attempt any maintenance procedure that is not specifically described in the documentation supplied with the WorkCentre Pro 421. To ensure optimum image quality at all times, clean the document glass and constant velocity transport glass monthly, or more often if needed. This helps avoid output with streaks, smears and other marks that transfer from the glass area when scanning documents. To clean the glass areas, use a lint-free cloth, lightly dampened with water or Xerox Lens and Mirror Cleaner. Regular cleaning keeps the Control Panel, Keyboard and LCD Display free from dust and dirt. To remove finger prints and smudges, clean the control panel, keyboard and LCD screen with a soft, lint-free cloth, lightly dampened with water. [. . . ] Before installing this equipment, users should ensure that it is permissible to be connected to the facilities of the local telecommunications company. The equipment must also be installed using an acceptable method of connection. In some cases, the company's inside wiring associated with a single line individual service may be extended by means of a certified connector assembly (telephone extension cord). The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations. [. . . ]