The Marker Settings properties let you change the shape, size, and color of the effectors that make up a Control rig. By default, IK effectors display as red or blue spheres. See Changing the appearance of Control rigs for procedures.
Properties window A. Marker Settings
Lets you select the shape of Control rig IK effectors. See Changing the look of IK or FK effectors.
Lets you select the resolution level (Low, Medium, or High) to display the effector in the character.
Lets you change the size of a selected effector. By default, red IK effectors are size 300 or 500, and blue IK effectors are size 120 or 200. See Changing the appearance of Control rigs.
Lets you adjust the color of Control rig effectors. You can also double-click the Color RGB field to open the Color window and select a new color for the selected effector.