Resolve Windows 10 related issues for your HP computers or printers by HP Windows 10 Support Center
How do I change the default from color to grayscale on HR Envy 7645
For Windows, please use the following steps
(a) Double click HP Envy icon on desktop,
(b) Select Set Preferences,
(c) Click Advanced (in Paper/Quality tab),
(d) From Print Graycale drop down options select Black Ink Only
(e) Click Apply/Ok
Note: Using Grayscale the printer will mix all colors therefore using Black Ink Only is a better option to print B&W.
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