Turns the constraint display status on and off and controls the shading of objects based on their constraint level.

When the display status is on, objects are shaded based on whether they are partially constrained, fully constrained, over constrained, or not constrained.

You can turn the display status on or off using an icon in the drawing status bar. The colors corresponding to the constraint status can also be modified in the Block Editor Settings dialog box. When you enter the Block Editor, the value is always set to 0.