Update en-US/Design.xml

daobrien · nmuller66 · web-flow · commit 0d3a13fada16 · 2020-12-03T11:53:58.000+10:00
Co-authored-by: Nicole Muller &lt;50212653+nmuller66@users.noreply.github.com&gt;
diff --git a/en-US/Design.xml b/en-US/Design.xml
@@ -303,7 +303,7 @@ $ vi myFile.txt
           <important>
             <para>
               Do not mix these two styles.
-              Maintain the same style throughout your document.
+              Maintain the same style throughout your document or book.
             </para>
           </important>
           <para>
