[css-fonts-4] help with #2485

Author: svgeesus

css-fonts-4/Overview.bs

@@ -1943,25 +1943,27 @@ Font property descriptors: the 'font-style!!descriptor', 'font-weight!!descripto
 
 	<pre class='descdef'>
 	Name: font-style
-	Value: normal | italic | oblique [ <<angle>> | <<angle>> <<angle>> ] ?
+	Value: auto | normal | italic | oblique [ <<angle>> | <<angle>> <<angle>> ] ?
 	For: @font-face
 	Initial: normal
 	</pre>
 
 	<pre class='descdef'>
 	Name: font-weight
-	Value: <<font-weight-absolute>> <<font-weight-absolute>>?
+	Value: auto | <<font-weight-absolute>> <<font-weight-absolute>>?
 	For: @font-face
 	Initial: normal
 	</pre>
 
 	<pre class='descdef'>
 	Name: font-stretch
-	Value: <<'font-stretch'>> <<'font-stretch'>>?
+	Value: auto | <<'font-stretch'>> <<'font-stretch'>>?
 	For: @font-face
 	Initial: normal
 	</pre>
 
+
+
 These descriptors define the characteristics of a font face
 and are used in the process of matching styles to specific faces.
 For a font family defined with several ''@font-face'' rules,
@@ -1985,6 +1987,11 @@ in order to forbid decreasing ranges.
 Both endpoints are inclusive.
 The ranges are used in the <a href="#font-matching-algorithm">Font Matching Algorithm</a> below.
 
+	The auto values for these three descriptors have the following effects:
+
+	- For font selection purposes, the font is selected as if the appropriate initial value is chosen
+	- For variation axis clamping, clamping does not occur
+
 The value for these font face style attributes
 is used in place of the style implied by the underlying font data.
 This allows authors to combine faces in flexible combinations,