Use the Construction Line tool to draw lines that help you create an accurate sketch. Construction lines become axes in 3D. They are also useful for creating mirrors.
The sketch grid must be visible in the workspace before you can draw.
To draw a construction line
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Select the Construction Line tool
from the Sketch ribbon group. -
(Optional) Dimension the first point relative to another sketch object.
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Click to set the first point of the line.
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(Optional) Dimension the line.
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Click or press Enter to end the line.
By default, the line is dimensioned to its start point, but you can dimension to another sketch object.
To use a construction line as a mirror
Right-click the line and select Set as Mirror Line.
To toggle between a line and a construction line
Right-click the line and select Construction On/Off.
Options
The following options are available for every sketch tool:
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Cartesian dimensions: Select a point in a sketch and then click this option to see Cartesian dimensions from the point. Cartesian dimensions show you the X and Y distances from the point you select. If you don't have a point selected, it shows you the X and Y distances from the origin.
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Polar dimensions: Select a point in a sketch and then click this option to see Polar dimensions from the point. Polar dimensions show you an angle and a distance from the point you select. If you don't have a point selected, it shows you the angle and distance from the origin.
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Snap to grid: Select this option turn snapping on or off while sketching. The cursor will snap to the minor grid spacing increment while you sketch. The defaults are 1mm for Metric and 0.125in for Imperial units. See Units options to change the minor grid spacing.
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Snap to angle: Select this option to turn angle snapping on or off while sketching. The cursor will snap to the angular snap increment while you sketch. The default is 15 degrees. See Snap options to change the angular increment used for snapping.
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Create layout curves: The sketch curves are created as layout curves. If you move the design to a drawing sheet, with Sketch mode selected you must select the Create layout curves checkbox again in the Sketch Options group of the Options panel in order to create layout curves on the drawing sheet. See Layout Curves.