> For the complete documentation index, see [llms.txt](https://docs.engagevr.io/developer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.engagevr.io/developer/afx/afx-graphs/ports.md).

# Ports

Ports represent connection points on a node. The color of a port indicates its data type. The shape of the port provides additional information, as described in the following table.

<table><thead><tr><th width="124">Icon</th><th width="203">Appearance</th><th>Description</th></tr></thead><tbody><tr><td><img src="https://2640392766-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F5yxYHsXtlAaoMUrDWhLm%2Fuploads%2Fgit-blob-05d580add3fe3eec46141e57af874058d035bdf3%2Fafx_port_outline.png?alt=media" alt=""></td><td>Outlined circle</td><td>An unconnected port of a specific data type.</td></tr><tr><td><img src="https://2640392766-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F5yxYHsXtlAaoMUrDWhLm%2Fuploads%2Fgit-blob-fbfd8a2f06b770137e8194dc029344f89588c3bd%2Fafx_port_solid.png?alt=media" alt=""></td><td>Filled circle</td><td>An connected port of a specific data type.</td></tr><tr><td><img src="https://2640392766-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F5yxYHsXtlAaoMUrDWhLm%2Fuploads%2Fgit-blob-e7a26e16672d004588170c138facd88101bf757c%2Fafx_port_square.png?alt=media" alt=""></td><td>Square</td><td>An object port. You can connect any data type to an object port. However, depending on the node, only specific data types will be valid.</td></tr><tr><td><img src="https://2640392766-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F5yxYHsXtlAaoMUrDWhLm%2Fuploads%2Fgit-blob-daf42b6ee1d95c96ce6f053ab0ffc425fcd98a81%2Fafx_port_arrow.png?alt=media" alt=""></td><td>Triangle</td><td>A flow port. For more information, see <a data-mention href="/developer/afx/afx-graphs/flows.md">Flows</a>.</td></tr></tbody></table>

{% hint style="info" %}
For information about how you can create connections between ports, see [Connections](/developer/afx/afx-graphs/connections.md).
{% endhint %}

## Viewing port values

When you activate play mode in the Unity editor, you can view the value of some output ports. If you move the mouse cursor over the output port, a tooltip indicates the type and value.

<figure><img src="https://2640392766-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F5yxYHsXtlAaoMUrDWhLm%2Fuploads%2Fgit-blob-48109e665af3ef5f6183093dd68fc033e0904a0e%2Fafx_port_value.png?alt=media" alt=""><figcaption><p>Tooltip to preview output of the Math Add node</p></figcaption></figure>