Editing : Editing Clips and Selections : Editing Stereo and Multichannel Tracks : Split Selected Tracks

Split Selected Tracks
To edit a specific channel within a stereo or multichannel track without affecting the other channels, you can split the track into separate mono tracks. Once the edits have been made to the separated material, you can then drag or copy it back to the original multichannel track.
To split a stereo or multichannel track:
1 Select one or more stereo or multichannel tracks (see Selecting Tracks).
2 Choose Track > Split Into Mono. Clips from the channels on the selected tracks are placed on new, mono audio tracks.
Names for the new tracks are based on the source track name and channel suffix. For example, if a stereo track called “Funkit” is split, two new tracks called “Funkit.L” and “Funkit.R” are created.
Output and send assignments and volume and pan settings are retained in the new tracks. Mono equivalents of stereo and multi-mono plug-in assignments are assigned in the new tracks. However, multichannel plug-in assignments are not assigned in the new tracks.