# Custom Port Menu
## Description
The Custom [Port](Port.md) Menu is displayed in the **Node Settings** tab of the [Graph Inspector](Internal-Inspector.md) by clicking on the [Custom Function Node](Custom-Function-Node.md) and [Sub Graph](Sub-graph.md) output node. This menu allows you to add, remove, rename, reorder, and define the types of your custom input and output ports.
## How to Use
Select the [Custom Function Node](Custom-Function-Node.md) or the [Sub Graph](Sub-graph.md) output node to view the Custom Port Menu in the Inspector. To close the menu, click anywhere in the graph or on another graph-element.
### Adding and Removing Ports
To add ports, click the `+` icon at the bottom right corner of the port list.
To remove ports, select a port using the hamburger icon on the left, and click the `-` icon at the bottom right corner of the port list.
### Renaming Ports
To rename a port, double-click its text field and enter the new name. Currently, only the following characters are valid for port names: A-Z, a-z, 0-9, _, ( ), and whitespace. If the name contains an invalid character, an error badge appears.
### Reordering Ports
To reorder ports, click and hold the hamburger icon on the left, and drag the port to your desired place in the list.
### Changing Port Types
To change a port type, use the Type drop-down menu on the right. See the [Data Types](Data-Types.md) page for a list of currently valid port types.
