> ## Documentation Index
> Fetch the complete documentation index at: https://docs.gridshift.studio/llms.txt
> Use this file to discover all available pages before exploring further.

# Reference Track

> Shows another track's notes dimmed behind the piano roll while you write, such as the bass under the chords. Pick the track in the piano roll's Reference track chip.

## Write against another track

Open a MIDI clip with `⌥↓`, click the **Reference track** chip (two stacked layers) in the focus bar and pick a track, such as the bass while you write the chords. Its notes appear dimmed behind the roll, in that track's color.

## More actions

* **Put it away:** pick the chosen track again, or **None**.

## Good to know

* **The reference track is never edited.** Its notes cannot be clicked, and it stays chosen as you move between clips.
* **The menu lists every visible track with MIDI clips**, except the one you are editing; tracks inside a collapsed group are left out. With no such track the chip is hidden.
* **Reference notes keep their own timing and their track's groove**, and are not cut at the edges of the open clip.
* **The choice lasts for this session only** and has no palette command.


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