Show FK

Displays the chain's current FK pose in the viewport as a line, the color of which is defined by the FK color field.

Show IK

Displays the chain's current IK pose in the viewport as a line, the color of which is defined by the IK color field.

Handle Line

Draws a line in the viewport from the chain's origin to its goal. The line's color is defined by the Handle color field.

Pole Vector

Controls whether a line is drawn for the pole vector, and if so, where the line starts. The following options are available:

None

Hides the pole vector line.

Root

Draws the line from the chain's origin (the object to which the IK tag is assigned) to the pole vector.

Joint

Draws the line from the first joint after the chain's origin to the pole vector.

FK

IK

Handle

Pole Vector

These color fields enable you to choose which colors are used for the lines when their corresponding options are enabled.