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# Editing a Node’s Parameters

Each node has parameters that alter how the node behaves within the recipe. These parameters can be changed within the Parameters tab.

A parameter’s value comes from one of three things:

• A constant.

For example: 9, test, or /root/world/cam/camera

• An expression.

For example: 16-3, scenegraphLocationFromNode(getNode(’CameraCreate’)), or getNode(’CameraCreate’).fov. Please refer to the Developer Guide for more information.

• A curve: only available for numeric inputs. See Animation.