[css-inline-3] Clarify interaction of text-box-trim and inline-sizing w3c#10703

Author: fantasai

css-inline-3/Overview.bs

@@ -1403,6 +1403,7 @@ Trimming Over/Under Text: the 'text-box-trim' property</h3>
 	On [=inline boxes=],
 	specifies whether to trim the [=content box=]
 	to match the specified 'text-box-edge' metric.
+	See [[#inline-height]] for details.
 
 	On [=block containers=],
 	as well as on each column of a [=multi-column container=],
@@ -1537,7 +1538,9 @@ Inline Box Drawing Height: the 'inline-sizing' property</h3>
 			The <a>content area</a> of the <a>inline box</a>
 			is sized and positioned to fit (possibly hypothetical) text
 			from its [=first available font=].
-			This specification does not specify how.
+			If 'text-box-trim' indicates trimming,
+			then the specified metric must be used.
+			Otherwise, this specification does not specify how.
 			A UA may, e.g., use the maximum ascender and descender of the font.
 			(This would ensure that glyphs with parts above or below the em-box
 			still fall within the content area,