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default printer control

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How I can change default printer by using help of application command?

Actually application using multiple printers and default printer required to set when switching printer based on application preference.

How I can change default printer by using help of application command? Actually application using multiple printers and default printer required to set when switching printer based on application preference.

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In Firefox the "default printer" is the last printer that was used. There is no "application command" that I have ever heard of which controls the selected printer from any sort of "command line switch".

But, there is a hidden preference in the "Configuration Editor" - print.save_print_settings which set to true which controls whether the "last used" is the default or not. https://support.mozilla.org/en-US/kb/about-config-editor-firefox

You can a "toggle" that pref to false and see how that works for you.