The pattern manager is useful for cleaning up stray patterns and as an overview of pattern usage.
![pattern manager dialog](pattern-manager.png)
"De-duplicate patterns" looks for matching patterns, eliminates all but the first instance, and changes all references in the order list to match.
"Re-arrange patterns" renumbers patterns to be in sequence, along with changing all references in the order list to match.
The pattern grid shows each channel and all its patterns. These are color-coded to show how much they're used in the song; these colors can be changed in Settings.