

To change font face, select a new one from the dropdown menu next to "Font name". The font is changed on the right side of the Style Configurator window. This style is listed as the first and if you haven't used Style Configurator before it will be selected by default when you open it.

In order to change font for all types of files, make sure you have selected "Global override" in the group "Global Styles". Besides styles for individual programming languages and file types, there is a group of Global Styles which apply universally. There are many different styles in Notepad++. You can access that via Main Menu / Settings / Style Configurator. You can change Notepad++ font face and size in a window called Style Configurator.
