Creating Construction Geometry
 Several types of construction lines and circles are available.
Construction-Angular Line
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- Select a point through which the construction line will pass. Select a second point, or enter the slant in the Inspector Bar.
- The construction line is created, with the properties assigned to the construction layer.
 Construction-Horizontal Line, Vertical Line
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- Select the point through which the construction line will pass.
- Continue creating construction lines of the same type, and select Finish when done.
Construction-Parallel
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- Select the line to which the construction line will be parallel. You can also select a construction line.
- Select a point through which the construction line will pass, or enter the offset in the Inspector Bar.
Tip: To make multiple construction lines separated by the same distance, lock the Offset field in the Inspector Bar, and create parallel lines from each successive line.
Construction-Perpendicular
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- Select the line to which the construction line will be perpendicular. You can also select a construction line.
- Select a point through which the construction line will pass.
 Construction-Center and Point Circle
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Creates a construction circle by defining its center and a point on its circumference.
- Select the circle centerpoint. Move the cursor to begin to size the circle.
- Click to create the circle, or enter the radius, diameter, or circumference in the Inspector Bar.
Construction-Double Point Circle
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Creates a construction circle by defining two opposite points on its circumference.
- Select a point on the circle circumference.
- Select the point on the opposite end of the diameter line, or enter the radius, diameter or circumference, and angle of the diameter line in the Inspector Bar.
Construction-Triple Point Circle
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Creates a construction circle that passes through three points.
- Select the first point on the circumference.
- Select the second point.
- Select the third point.
 Construction-Perpendicular by Line
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Creates a construction line perpendicular to a line defined by two points.
Start with two circles, We will create a construction line halfway between the centers of the two circles perpendicular to the axis between the two centers.
- Select the tool, then snap to the center of the first circle.
- Move the cursor. Notice that the preview of the construction line is parallel to the line you are dragging out.
- Snap to the center of the other circle to set the construction line.
Construction-Bisection
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Creates a construction line which bisects an angle
- Click on the first point. this will be thevertex of the angle to be bisected.
- Click on the second point. this will be the first edge of the angle to be bisected.
- Click on the third point. this will be the second edge of the angle to be bisected.
- Move the cursor. Notice that the preview of the construction line is parallel to the line you are dragging out.
- Snap to the center of the other circle to set the construction line.
- Move the cursor. Notice that the preview of the construction line is parallel to the line you are dragging out.