Creating center marks and center lines
Center marks and center lines are associative dimensioning references that do not contain measurement data. A center mark is a small cross that marks the center of a circle or an arc. Center lines are linear entities drawn between two lines or two linear segments of polylines.
Both are associative, meaning that when the associated entity changes, so does the center mark or center line entity. This is different than the non-associative center marks and lines that can be drawn with dimension styles.
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