order of appearance in the formal grammar of the values
/* Use the default settings */
/* Set values for OpenType axis names */
font-variation-settings: "xhgt" 0.7;
Text is laid out using default settings.
When rendering text, the list of OpenType axis names is passed to the text layout engine to enable or disable font features. Each setting is always a <string> of 4 ASCII characters, followed by a <number> indicating the axis value. If the <string> has more or fewer characters or contains characters outside the U+20 - U+7E codepoint range, the whole property is invalid. The <number> can be fractional or negative.