To constrain objects to a reference point

1. On the Reference Point toolbar, click a constraint button:

Constrain to X

Constrain to Y

Constrain to Angle

Constrain to Distance

The constraint is turned on when its button is depressed.

2. Type the constraint value in the spin box beside the button, or click the arrows beside the box to select a value.

Clicking a constraint button alternately turns it on and off. Hiding the reference point disables the constraint (while the reference point is hidden). You can also turn reference point constraints on and off using keyboard shortcuts. For more information, see Reference Point in Keyboard Shortcuts.