Prefix Playlists
Select any number of playlists, right click and select Playlist tools ➡ Prefix to add text before each playlist name.
Text
Choose the text option to add text before each playlist name.
Number
Choose the number option to add an increasing number before each playlist. You can tell Lexicon to remove an existing number prefix so it will be replaced by the new number.
You can add a leading zero for better sorting.
Hotkey
You can set a hotkey for Prefix in the Lexicon settings under Hotkeys ➡ Playlists. It uses the playlists selected in the playlist tree.