How to set the HP color printer to print in black and white by default?

Generally speaking, if a color printer wants to print in black and white, it can be operated in the driver.

Start on the computer-devices and printers or printers and faxes-right-click printer properties-printing preferences-colors. There will be grayscale printing options in this box. Tick the box to print in black and white.

There are printers and fax machines in the Control Panel. After opening, right-click the printer icon, select printing preferences, find the "Color" tab, select grayscale printing and select "Print only with black ink cartridges" in the drop-down menu, and then click OK. If it doesn't work, right-click the printer icon, select Properties, find the port label, remove the √ in front of "Enable two-way support", and click OK.