[css-cascade] Give 'applies to' its own subsection. w3c#5565

Author: fantasai

css-cascade-4/Overview.bs

@@ -577,41 +577,47 @@ Used Values</h3>
 		As another example, a <code>&lt;div></code> might have a computed 'break-before' value of ''auto'',
 		but acquire a used 'break-before' value of ''break-before/page'' by propagation from its first child. [[css-break-3]]
 
-	If a property does not <dfn export for=CSS id="applies-to">apply to</dfn>
-	this element or box type--
-	as noted in its “Applies to” line--
-	then it does not directly take effect on that type of box or element,
-	and therefore has no <a>used value</a> for that property.
+	If a property does not [=apply to=]
+	this element or box type
+	then it has no <a>used value</a> for that property.
 
 	<p class='example'>
 		For example, the 'flex' property has no <a>used value</a>
 		on elements that aren't <a>flex items</a>.
 
-	<div class=note>
-		Note: Some properties that do not apply to certain elements or boxes
-		may still have <em>indirect</em> formatting effects:
-		their computed value may be taken into account
-		in the computation of other properties or units
-		that do have an effect on the element or box;
-		inherited properties are also often set on elements
-		that they don't apply to
-		in order to get them to inherit into descendants to which they do apply,
-		including cases where these descendants are anonymous boxes.
-
-		<div class=example>
-			Even though 'writing-mode' and 'text-orientation' do not apply to table rows,
-			setting them on such boxes
-			will still affect the calculation of font relative units such as ''ch'',
-			and thus possibly any property that takes a <<length>>.
-		</div>
-		<div class=example>
-			Setting 'text-transform' on an HTML <{p}> element
-			(which is ''display: block'' by default)
-			will have an effect,
-			even though 'text-transform' only applies to [=inline boxes=],
-			because the property inherits
-			into the paragraph's anonymous [=root inline box=].
-		</div>
+<h4 id="applies-to">
+Applicable Properties</h4>
+
+	If a property does not <dfn export for=CSS id="apply">apply to</dfn>
+	an element or box type--
+	as noted in its “Applies to” line--
+	this means it does not directly take effect on that type of box or element.
+
+	Note: A property that does not apply
+	can still have <em>indirect</em> formatting effects
+	if its computed value affects the computation of other properties
+	that do apply;
+	and of course its [=computed value=],
+	which always exists,
+	can still inherit to descendants
+	and take effect on them.
+
+	<div class=example>
+		Even though 'writing-mode' and 'text-orientation' do not apply to table rows
+		(they do not affect how the table row or its children are laid out),
+		setting them on such boxes
+		will still affect the calculation of font relative units such as ''ch'',
+		and thus possibly any property that takes a <<length>>.
+	</div>
+
+	<div class=example>
+		Setting 'text-transform' on an HTML <{p}> element
+		(which is ''display: block'' by default)
+		will have an effect,
+		even though 'text-transform' only applies to [=inline boxes=],
+		because the property inherits
+		into the paragraph's anonymous [=root inline box=]
+		and applies to the text it contains.
 	</div>
 
 	Note: A property defined to apply to “all elements”