When you make a selection between either Global Fax, or printer in the Chooser then close it, you save that setting as your default printer. By using this method you are changing the Default Printer every time.
An easier way would be to select your printer in the Chooser as the default printer. When you want to send a fax, first press and hold the Option key, then from the File menu select Print or Fax (Fax will appear if the application you are using supports this feature). After you have finished sending your fax, system software will automatically switch back to your default printer.
The Option key can also be changed to the Command key in the Chooser by selecting Global Fax and hitting the radio button Shortcut.
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