In some drawing standards, when drawing a building or object that is in complete symmetry, the designer may draw only half of the model and insert a symmetry label to indicate the symmetry line.
Symmetry labels maintain a constant size regardless of the drawing scale.
To create a symmetry label:
Click the Symmetry Label tool from the Dims/Notes tool set.
Click to place the object in the drawing, and click again to set the length and rotation.
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