[css-writing-modes] Improve note on auto-multicol

Author: fantasai

css-writing-modes/Overview.bs

@@ -1907,6 +1907,8 @@ Auto-sizing in Orthogonal Flows</h4>
     in place of the <i>available inline-size</i> for calculations that
     require a definite <i>available inline-size</i>.
 
+  <p>See [[!CSS3-SIZING]] for further details on CSS sizing terminology and concepts.
+
 <h4 id=auto-multicol>
 Auto-sizing Block Containers in Orthogonal Flows</h4>
 
@@ -1935,18 +1937,18 @@ Auto-sizing Block Containers in Orthogonal Flows</h4>
           <li>the initial containing block’s <i>inline-size</i>
       </dl>
 
-      <p>
-        See [[!CSS3-SIZING]] for further details.
-
       <div class="note">
         <div class=sidefigure>
           <img src="auto-multicol.svg" width=200
             alt="Diagram of automatically triggered multi-column preventing T-shaped documents">
         </div>
-        This automatically triggers multi-column flow
+        Note that this automatically triggers multi-column flow on all block containers
         so that overflowing content, instead of continuing off the side of the containing block,
         is wrapped into columns in the flow direction of the containing block,
         thus avoiding T-shaped documents.
+        Authors can control the measure of these columns by setting 'column-width',
+        or disable this behavior by setting 'width' to a non-''auto'' value
+        such as ''max-content''.
         <br style="clear:both;">
       </div>
 

css-writing-modes/Overview.html

@@ -1975,6 +1975,8 @@ <h4 class="heading settled heading" data-level=7.3.1 id=orthogonal-auto><span cl
     in place of the <a data-link-type=dfn href=http://dev.w3.org/csswg/css-sizing-3/#available title="available inline-size">available inline-size</a> for calculations that
     require a definite <a data-link-type=dfn href=http://dev.w3.org/csswg/css-sizing-3/#available title="available inline-size">available inline-size</a>.
 
+  <p>See <a data-biblio-type=normative data-link-type=biblio href=#biblio-css3-sizing title=biblio-css3-sizing>[CSS3-SIZING]</a> for further details on CSS sizing terminology and concepts.
+
 <h4 class="heading settled heading" data-level=7.3.2 id=auto-multicol><span class=secno>7.3.2 </span><span class=content>
 Auto-sizing Block Containers in Orthogonal Flows</span><a class=self-link href=#auto-multicol></a></h4>
 
@@ -2003,17 +2005,17 @@ <h4 class="heading settled heading" data-level=7.3.2 id=auto-multicol><span clas
           <li>the initial containing block’s <a data-link-type=dfn href=#inline-size title=inline-size>inline-size</a>
       </ul></dl>
 
-      <p>
-        See <a data-biblio-type=normative data-link-type=biblio href=#biblio-css3-sizing title=biblio-css3-sizing>[CSS3-SIZING]</a> for further details.
-
       <div class=note>
         <div class=sidefigure>
           <img alt="Diagram of automatically triggered multi-column preventing T-shaped documents" src=auto-multicol.svg width=200>
         </div>
-        This automatically triggers multi-column flow
+        Note that this automatically triggers multi-column flow on all block containers
         so that overflowing content, instead of continuing off the side of the containing block,
         is wrapped into columns in the flow direction of the containing block,
         thus avoiding T-shaped documents.
+        Authors can control the measure of these columns by setting <a class=property data-link-type=propdesc href=http://dev.w3.org/csswg/css-multicol-1/#propdef-column-width title=column-width>column-width</a>,
+        or disable this behavior by setting <a class=property data-link-type=propdesc href=http://dev.w3.org/csswg/css2/visudet.html#propdef-width title=width>width</a> to a non-<span class=css data-link-type=maybe title=auto>auto</span> value
+        such as <span class=css data-link-type=maybe title=max-content>max-content</span>.
         <br style=clear:both;>
       </div>
 
@@ -2483,13 +2485,15 @@ <h3 class="no-num heading settled heading" id=changes-201311><span class=content
   <ul>
     <li>Fixed orthogonal flows auto-sizing rules to better handle shrink-wrapping.
   </ul>
+
 <h2 class="no-num heading settled heading" id=acknowledgements><span class=content>
 Acknowledgements</span><a class=self-link href=#acknowledgements></a></h2>
 
 <p>John Daggett, Martin Heijdra, Laurentiu Iancu,
 Yasuo Kida, Tatsuo Kobayashi, Toshi Kobayashi,
 Ken Lunde, Nat McCully, Eric Muller,
 Paul Nelson, Kenzou Onozawa, Dwayne Robinson,
+Simon Sapin
 Michel Suignard, Taro Yamamoto, Steve Zilles</p>
 
 <h2 class="no-num heading settled heading" id=character-properties><span class=content>Appendix A.