# Display key

You can display all tones of a scale or the current mode on the instrument.

{% hint style="info" %}
In this way, you will know which tones sound great in your song. Or you can learn the scale you have selected.
{% endhint %}

To do so, make sure the instrument is visible.

👉 Tap on the instrument title:

<div align="left"><img src="/files/-Lz72O3KVemOzNdqT5zN" alt=""></div>

👉 Tap this icon:

<div align="left"><img src="/files/-LzBarrkz9mpM6phurgW" alt=""></div>


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# Agent Instructions: Querying This Documentation

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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://guide.tonaly.app/instrument/piano/display-key.md?ask=<question>
```

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Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
