# Links

<figure><img src="https://2268858626-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxF3J9z75cLxrADGYFAvj%2Fuploads%2FJFWQXdg6IBCF3h5O4kjQ%2FlinksTree.png?alt=media&#x26;token=0ca476e8-9cd6-4014-949a-3c22927cf388" alt=""><figcaption></figcaption></figure>

KPI trees require a structure where every metric has only one parent metric. In the Custom Links section you can add additional links to your KPI tree.

<figure><img src="https://2268858626-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FxF3J9z75cLxrADGYFAvj%2Fuploads%2FJNXY60MKjTDq6v4JJIt3%2Fadditional%20links.gif?alt=media&#x26;token=5ec41e5a-c5b0-4e56-93f0-1f628852a04a" alt=""><figcaption></figcaption></figure>