Channel Box

To open the Channel Box

If the Show Layer Editor within Channel Box option is off in the UI Elements preferences (Windows > Settings/Preferences > Preferences), then the Channel Box and Layer Editor buttons appear separate.

The Channel Box is the primary, fastest, and most streamlined tool for editing object attributes. It lets you quickly change attribute values, set keys on keyable attributes, lock or unlock attributes, and create expressions on attributes.

You can undock the Channel Box from its default position on the right side of the interface and have it in a floating window or dock it elsewhere - see Dock and undock windows and panels for more information.

Like the Attribute Editor, you use the Channel Box to modify an object’s attribute values. The Channel Box is different from the Attribute Editor in the following ways:

The information displayed in the Channel Box varies, depending on what kind of object or component you have selected. If you haven’t selected an object, the Channel Box is blank.


The Channel Box will sometimes incorrectly display an enumerated attribute's pull-down menu. Extra menu items can appear that represent the numbers in between non-sequential option values. To fix the problem, specify sequential values for the options of any enumerated attributes that will appear in the Channel Box. For example: “solo=1:triplet=2:quintet=3”.


When you select a geometric object, the Channel Box displays these sections:

Section Usage
objectName Lists the keyable transform attributes that translate, scale, and rotate the object’s absolute position in the world space. Also shows the object’s visibility attribute.
SHAPES Lists the names of nodes that define the geometry of the object. Other nodes, such as related particle emitters may be found here.
INPUTS Lists the names of other nodes that affect this one. Typically, these comprise the construction history of the node.
OUTPUTS Lists the names of the output nodes (nodes that receive data) for this node.

If you’ve selected two or more objects, the Channel Box displays the attributes for the last object selected only. To display the attributes in the Channel Box of another selected object, select Object > objectName.

Edits you make in the Channel Box affect all selected objects of the same type as the one displayed.

Component attributes

If you display attributes of an object component, the Channel Box displays only one section for shape attributes that pertain to the component.

For example, suppose you’ve created a NURBS curve with the following CVs:

If you turn on component selection mode (in the main menu bar) and select the CVs, the Channel Box displays this:

You can display the CV values in the Channel Box and enter new values. To display the values, click CVs (click to show) in the Channel Box.

Channel Box colors

The following colors represent the state of channels in the Channel Box:

Locked Gray
Nonkeyable Light Gray
Muted Brown
Blended Green
Keyed On Frame Red
Keyed Off Frame Dark Pink
Key Altered Light Pink
Expression Purple
Constrained Blue
Connected Yellow


Use the INPUTS component of the Channel Box to modify an object’s construction history.

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