• Start drawing or editing, and hold down the Ctrl key to restrict pointer movement to the specified constrain angle or to restrict the object shape.
To change the direction of a line you're drawing, release Ctrl, and move the pointer in the direction you want. You can, then, hold down Ctrl again to restrict pointer movement to the constrain angle.
A rectangle is constrained to a square, an ellipse to a circle, and a polygon to a
To change the constrain angle, click Tools > Options. In the Workspace list of categories, click Edit, and type a value in the Constrain angle box.
You can change the constrain key from Ctrl to Shift, the Windows standard.
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