The Plain Text, Plain Font, and Plain Size commands on the Edit menu or on the Text Style toolbar remove overriding fonts, text sizes, or text styles from the selected text in a reference or a Style window.
When EndNote creates a bibliography, text in Plain Font and Plain Size uses the font and size of your paper. To use these commands, first select the text you want to change, and then select Plain Text, Plain Font, or Plain Size from the Edit menu or the toolbar.
Text entered into EndNote without any special font, size, or style applied is considered plain text, which is formatted in the font and size of your paper. Once you specifically apply a font, size or style to text, that formatting overrides the plain text setting.
If you have applied a font, size, or style to text in a reference or in a Style window, you can remove this special formatting and return to plain text. Select the text, go to the Edit > Font menu, and select Remove Font Formatting.
The default font used to display EndNote’s "Plain Text" is the default font of your operating system, but it can be changed using the General font option in the Display Fonts section of the EndNote preferences. Select Preferences from the EndNote Edit menu and click the Display Fonts option. The General font setting changes the font in which the references are displayed but does not affect the font of a bibliography created for a word processing document.