Editing WoW:XML/Button (section)

=== Fonts ===
The font's overall text style is defined by a series of 'overriding' properties. Each state's 'style' can use a different Font or FontString template. And the state's 'Color' if set, overrides the color in the state's style template. Setting 'ButtonText' definies a singular explicit [[XML/FontString|FontString]] for the Button, which overrides any button state options set in the Button's state properties.

Setting a 'XxxxFont' element is then effectively defining a default set of attributes for ButtonText when the button is in a particular state. For example, if ButtonText is defined and sets a 'FontHeight', it will override a NormalFont 'FontHeight'. If there is no ButtonText, then the values used to fabricate a FontString for display, come purely from 'text' attribute and the 'XxxxFont' elements. This overall 'Button > ButtonText > Switchabe ...Font' arrangement allows a Button to use predefined but flexible text and font constructs, and to automatically switch visual states with no further work.