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-layout: default
-title: Push/Pull Trimming
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-
-<p>
- Normally, when you trim regions by dragging with the mouse, it affects
- only the selected regions. Their lengths are directly affected by the
- trim operation, but nothing else is. Sometimes though, you might like
- to trim a region that directly adjoins another, and keep this relationship
- the same—you are not trying to make one of the regions extend
- over the other—you would like the junction to move in one
- direction or the other as part of the trim. This requires trimming both
- regions on either side of the junction, in opposite directions.
- <dfn>Push/Pull trim</dfn>, activated by pressing shift key before
- starting the drag, will do just that. Here's a few pictures to show the
- difference in the results of a normal trim and push/pull trim. First,
- the initial situation:
-</p>
-
-<p class="center"><img src="/images/a3_before_trim.png" alt="region arrangement before trim" /></p>
-
-<p>
- Here is what happens after we trim the right hand (selected) region by
- dragging its starting position earlier:
-</p>
-
-<p class="center"><img src="/images/a3_after_trim.png" alt="region arrangement after a trim" /></p>
-
-<p>
- You can see that it now overlaps the earlier region and a crossfade has
- been created between them.
-</p>
-
-<p>
- Lets look now at what happens if we do the same trim, but <kbd
- class="mouse mod3">Left</kbd>-dragging to turn it into a push-pull trim instead:
-</p>
-
-<p class="center"><img src="/images/a3_after_push_trim.png" alt="region arrangement after a push trim" /></p>
-
-<p>
- There is no overlap, and the end of the earlier region has been moved
- along with the start of the later region, so that they still directly
- adjoin each other.
-</p>
-