To Constrain the Pending Data Point to a Drawing Plane Axis

Position the pointer near the desired axis. When the pointer is on an axis, a highlighted line is displayed from the drawing plane origin to the pointer location.
Press the <Enter> key.
Smart Lock is engaged. Its effect is to constrain the pending data point to the axis.

Constraining the pending data point along x-axis.

Constraining the pending data point along y-axis.

You now can constrain the pending data point to a precise distance along the axis by keying in a value, or simply by snapping a tentative point to an element or monument point and accepting the tentative point as the data point location.

Tip: To disengage Smart Lock and unconstrain the pending data point, press <Enter> again. The <Enter> key turns off Smart Lock.

Note: Smart Lock will not lock to an axis when you are entering coordinate values into its field. Instead, AccuDraw returns the dynamic element to free motion.