7.15 Trim Behind When Editing
The toggle command Options, Trim content behind media items when editing can be used to ensure that existing material is effectively replaced by any new material that is placed over it.
Kind: concept (user-guide-section) Chapter: 7 Managing and Editing Media Items Source: REAPER User Guide v7.70
The toggle command Options, Trim content behind media items when editing can be used to ensure that existing material is effectively replaced by any new material that is placed over it. To understand this feature, let’s see what happens when you move one item onto another with “trim behind” disabled and enabled. First, note that trim behind when editing cannot work unless auto-crossfade is disabled. This is how REAPER behaves with trim behind disabled (the default setting). Shown here are two guitar tracks. 1. We drag and drop the item from the second track over the top of the first. 2. If we now enable free item positioning on the track and increase the track height, by dragging the item on top below the original media item, we can see both the original and the new item stored in this track. Let's repeat this, but this time with Trim content behind media items when editing enabled. Steps one and two would appear to be the same as before. But look what now happens at step 3. This time, when we allow free item positioning and drag the new item down, there is nothing behind it! The new item has replaced the original. Note that you do not have to usefree item positioning in oder to work with “trim behind” enabled.
Note: When razor editing, trimming behind is by default always applied when an item or part of one item is placed over another. To change this, disable Always trim content behind razor edits on the Options menu.