How do I decide which scanning resolution to select when scanning?

• The best scanning resolution depends on the purpose of the scan. Keep in mind that higher resolution settings increase the file size and scanning time, so do not select a higher resolution than you need. See the following table for the appropriate resolution setting to use.
  
  

  What you will do with the scanned image	Suggested scan resolution
  Send via e-mail, upload to web, or view only on the screen	100 to 150 dpi
  Print	200 to 400 dpi
  Print or convert documents to editable text (OCR)	200 to 400 dpi
  Fax	200 dpi
  Enlarge after scanning at 100%	Increase the resolution setting by same amount you will increase image size after scanning. For example, if the resolution is 300 dpi, but you want to increase the image size by 200%, change the resolution setting to 600 dpi.