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diff --git a/include/separate-under.html b/include/separate-under.html
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--- a/include/separate-under.html
+++ b/include/separate-under.html
@@ -1,24 +1,43 @@
 
+<h2>Separate Under</h2>
+
 <p>
-  You may have a situation where you have positioned one region over another,
-  and you just want to cut the lower region so that it directly adjoins both
-  ends of the overlapping one, with no overlaps. To do this, select the upper
-  region, then choose <kbd class="menu">Edit &gt; Separate &gt; Separate
-  Under</kbd>. This will split the lower region so that it no longer overlaps
-  the upper region at all. <br>
-  Here is an example where we start with a short region placed so that it
-  overlaps a longer region:
-</p>
-<img src="/images/a3_before_separate_under.png" alt="region arrangement before separate under" />
-<p>
-  When we perform the <dfn>Separate Under</dfn> edit, the lower region splits
-  in two, with boundaries exactly positioned at the edges of the upper region:
+  When one region is over another, and the lower region has to be cut so that it
+  directly adjoins both ends of the overlapping one, with no overlaps, the <dfn>
+  Separate Under</dfn> tool can be a very efficient time-saver.
+  With the upper region selected, the <kbd class="menu">Edit &gt; Separate &gt; Separate
+  Under</kbd> menu will split the lower region so that it no longer overlaps
+  the upper region at all.
 </p>
-<img src="/images/a3_after_separate_under.png" alt="region arrangement after separate under" />
+
+<figure>
+  <img src="/images/before-separate-under.png" alt="region arrangement before separate under">
+  <img src="/images/after-separate-under.png" alt="region arrangement after separate under">
+  <figcaption>
+    Region arrangement before and after 'Separate Under'
+  </figcaption>
+</figure>
+
 <p>
   If the upper region covers only one end of the lower region, then this
-  operation is equivalent to
-  <a href="@@trimming-regions#trimtonextprevious">Trim to Next or Trim to Previous</a>,
+  operation is equivalent to <a href="@@trimming-regions">Trim to Next or Trim to Previous</a>,
   depending on which end is covered.
 </p>
 
+<h2>Separate Using Range</h2>
+<p>
+  A loop or punch range can also be used to slice a region. By using the
+  <kbd class="menu">Edit &gt; Separate &gt; Separate Using Loop/Punch Range</kbd>,
+  any selected regions that are covered by the range at both ends of the range,
+  or just one if the range only covers part of the region. This makes it easy to
+  generate regions that correspond precisely to a range.
+</p>
+
+<figure>
+  <img src="/images/before-separate-loop.png" alt="region arrangement before separate using loop range">
+  <img src="/images/after-separate-loop.png" alt="region arrangement after separate using loop range">
+  <figcaption>
+    Region arrangement before and after 'Separate Using Loop Range'
+  </figcaption>
+</figure>
+