7 You may have a situation where you have positioned one region over another,
8 and you just want to cut the lower region so that it directly adjoins both
9 ends of the overlapping one, with no overlaps. To do this, select the upper
10 region, then choose <kbd class="menu">Edit > Separate > Separate
11 Under</kbd>. This will split the lower region so that it no longer overlaps
12 the upper region at all. <br />
13 Here is an example where we start with a short region placed so that it
14 overlaps a longer region:
16 <img src="/files/a3/a3_before_separate_under.png" alt="region arrangement before separate under" />
18 When we perform the <dfn>Separate Under</dfn> edit, the lower region splits
19 in two, with boundaries exactly positioned at the edges of the upper region:
21 <img src="/files/a3/a3_after_separate_under.png" alt="region arrangement after separate under" />
23 If the upper region covers only one end of the lower region, then this
24 operation is equivalent to
25 <a href="/editing-and-arranging/change-region-lengths/#trimtonextprevious">Trim to Next or Trim to Previous</a>,
26 depending on which end is covered.