[css-backgrounds-3][editorial] link defaults

Author: svgeesus

css-backgrounds-3/Overview.bs

@@ -36,6 +36,10 @@ spec:css-color-4; type:value; text:transparent
 spec:selectors-3; type:selector; text: ::first-letter
 spec:selectors-3; type:selector; text: ::first-line
 spec:css-values-3; type:type; text:<position>
+spec:html; type:element; text:body
+spec:css-sizing-3; type:dfn; text:size
+spec:css-sizing-3; type:dfn; text:width
+spec:css-sizing-3; type:dfn; text:height
 </pre>
 
 <h2 id="introduction">Introduction</h2>