19.2.12 Constraints palette

With this palette, you can constrain your cursor to move only along a specified axis. Here are the possible axes:

· horizontal, passing through the last point drawn.
· vertical, passing through the last point drawn.
· passing through the last point drawn and a specified point.
· passing through the last point drawn and parallel to a specified edge.
· passing through the last point drawn and perpendicular to a specified edge.
· horizontal, passing through a specified point.
· vertical, passing through a specified point.

Usage:

1. Display the Constraints palette.

· Click on the icon depicting the Constraint tool in the Control Panel.

2. Apply the constraint.

· Click on the icon depicting the constraint you want to apply to your cursor movement.
· Depending on the constraint type that you select, you many need to specify a point or an edge, as follows:

Icon	Constraint type	Click on
	Free moving: Disable the constraint effect by clicking on the “free moving” icon.
	Moving along a horizontal axis passing through a point “P” to be specified.	The point “P”
	Moving along a vertical axis passing through a point “P” to be specified.	The point “P”
	Moving along an axis passing through the last point drawn and a point “P” to be specified.	The point “P”

	Moving along an axis passing through the last point drawn and parallel to an edge “S” to be specified. The default is the last drawn edge.	The edge “S”
	Moving along an axis passing through the last point drawn and perpendicular to an edge “S” to be specified. The default is the last drawn edge.	The edge “S”

The specified constraint is immediately applied to the cursor.
You can repeat step 2.

3. Action.

Click when the cursor is at the desired position.
The constraint is disabled and the cursor can move freely again. If you need to apply a constraint again, return to step 2.