adding more on background images, selecting columns

Author: howcom

css3-gcpm/Overview.src.html

@@ -3027,6 +3027,9 @@ <h3>Pull-quotes</h3>
 
 <h3>Exclusions based on images</h3>
 
+
+
+
 <div class=example>
 <p>Here is an example that uses the background of the multicol element as a template for exclusions.
 <img src=car1.jpg>
@@ -3035,7 +3038,7 @@ <h3>Exclusions based on images</h3>
   padding: 4em;
   columns: 15em;
   background: url(nicecar.jpg);
-  background-exclude-threshold: 0.5;
+  background-exclude: 0.5;
 }  
 article h1 { column-span: all } /* Bonneville Speedway */
 </pre>  
@@ -3051,12 +3054,29 @@ <h3>Exclusions based on images</h3>
   padding: 4em;
   columns: 6em;
   background: url(nicecar.jpg);
-  background-exclude-threshold: 0.5;
+  background-exclude-level: 0.5;
 }  
 article h1 { column-span: all } /* Bonneville Speedway */
 </pre>  
 </div>
 
+<p>Background images can be repeated. Therefore exclusions based on images can be repeated.
+
+<div class=example>
+
+<img src=exclusions_repeating.jpg>
+
+<pre>
+article {
+  background: repeat-y url(zigzag.png);
+  background-exclude-level: 0.5;
+}
+
+</pre>
+
+</div>
+
+
 
 <h3>Exclusions based on shapes</h3>
 
@@ -3123,23 +3143,30 @@ <h2>Aligning baselines in multi-column layouts</h2>
 
 <h2>Regions</h2>
 
-<p>Regions are stylable boxes into which content can be poured.
-Columns are a kind of regions that are automatically generated to
+<p>Regions are series of stylable boxes into which content can be
+poured. Columns are regions that are automatically generated to
 contain all the content of the the multicol element. By adding
-selectors for columns, columns can be styled and positioned. 
+selectors for columns, columns can be styled and positioned and
+thereby escape the rigid patterns that columns naturally live in.
 
 <h3>Selecting columns</h3>
 
 <div class=example>
 <pre>
-div.chapter::column(3)           /* the third column of the element */
-div.chapter::column(2n)          /* all even columns of the element */
-div.chapter::column(3+)          /* all even columns of the element */
-div.chapter::column(2,2)         /* second column on second page */
-div.chapter::column(*,2)         /* all columns on the second page */
+div.chapter::column(3)       /* the 3rd column of the element */
+div.chapter::column(2n)      /* all even columns of the element */
+div.chapter::column(3+)      /* all columns but the 1st and 2nd */
+div.chapter::column(2,2)     /* second column on second page */
+div.chapter::column(*,2)     /* all columns on the second page */
+div.chapter::column(,2)      /* all columns on the second page */
 </pre>
 </div>
 
+
+<h3>Turning columns into regions</h3>
+
+<p>A column that is moved from its natural position into 
+
 <p>Columns can be moved 
 
 <div class=example>