Once you have found a selection in an alternate playlist that you want to use in the main playlist, copy and paste the selection to the main playlist. In this way you can construct the best combination of selections from alternate playlists.
In addition to manually copying and then pasting to the main playlist, Pro Tools provides several commands for copying and pasting the selection to the main playlist:
Copies and pastes the selection to the main playlist. Any material already on the main playlist at the same location is overwritten.
Creates a new, empty main playlist and copies and pastes the selection to the new main playlist
Duplicates the current main playlist and copies and pastes the selection to the duplicate of the main playlist. The previous main playlist moves to a new Playlist lane.
The selection from the alternate playlist is copied to the same time location in the main playlist.