How do I print in black ink only?

• Open a document, then follow the steps below for your operating system to select Black/Grayscale or Grayscale in the printer driver.
  
  Note:
  To keep the print head clear and ready to print, the printer uses a small amount of ink from all the cartridges whenever it prints. Even if you select Black/Grayscale or Grayscale, some color ink is still being used.
  
  Black/Grayscale or Grayscale is not recommended for printing black-and-white photos.
  
  Windows
  1. Open the File menu or click and select Print.
  2. Make sure the WorkForce Pro WP-4540 is selected as the printer.
  3. Click Properties or Preferences.
     
     Note:
     If you don't see these buttons, click Setup, Printer, or Options, then click Properties or Preferences on the next screen.
  4. Under Main tab, select the Black/Grayscale radio button.
  5. Click OK.
  Mac OS X
  1. Open the File menu and select Print.
  2. Make sure the WorkForce Pro WP-4540 is selected as the printer.
     
     With Mac OS X 10.5, 10.6, and 10.7 click the  button to expand the Print window, if necessary.
  3. Select Print Settings from the printer options pop-up menu.
  4. Select the Grayscale check box.