Send via Fax: Advanced Features
Attachments
pagesender supports faxing additional documents along with the one you are printing. To add additional documents to your fax, press the attachments button:
Drag PDF files from the Finder to the attachments list. Re-arrange the order of documents in the fax by dropping one document on top of another document in the attachments list (the dropped document will move below the document upon which it was dropped).
Options
To access additional fax options, press the options button: 
Scheduled Faxing
You may schedule your fax for sending Now, At: a specific time and date, or choose Hold to defer the sending of your fax. To send a fax kept On Hold, select the fax in pagesender Fax Center's Out folder and press the Resend button.
You may select the E-mail address used for fax-to-Email services such as eFax.com, jConnect, EasyLink, and MaxEmail in the options pane.
Dithering (grayscale)
pagesender supports dithering (sometimes known as grayscaling) faxes by default. Dithering makes faxing graphics and photos look good.
Explanation: Faxes have only one color per pixel (black or white). Most documents created on a computer have at least 256 colors or shades of gray per pixel, sometimes millions. Dithering is the process where an image with a larger palette of colors is reduced to black and white by distributing the error involved in the conversion among neighboring pixels.
Dithering is turned on when the button looks like this: 
Dithering can make sharp edges look jagged, so pagesender allows you to turn off dithering by pressing the button so that it looks like this: 
If you are faxing only text and wish it to be as sharp as possible, ensure that dithering is off. If you are faxing documents with graphics or photos, ensure that dithering is on.
pagesender supports adding addresses from a text file. Drag & drop your text file into the address list in the Print dialog, and your addresses will be added. Each line should be either 3 or 4 columns and each entry on the line should be separated by commas or spaces. The columns are: name, company, number, and optionally country code. Styles can be mixed within a single file. Here are examples of valid lines:
Greg Scown,Smile Software,+1-408-884-2320 Philip Goward,SmileOnMyMac,408-884-2320,1 Greg Scown Smile Software +1-408-884-2320 Philip Goward SmileOnMyMac 408-884-2320 1