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CAD tip # 7068:

Question CAD
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Parametric dimensions: changing geometry by overwriting dimension.

Since AutoCAD 2010 you can not only change the dimension by changing the geometry, but also use the opposite process - change the geometry by changing (overwriting) the dimension text.

From the ribbon Parametric > Dimension run e.g. the function Diameter constraint (the command DIMCONSTRAINT). Select a circle and confirm the placement of the dimension. Using the CONSTRAINTNAMEFORMAT variable you can influence the display of the dimension (dim constraint). Now double-click on the dimension text and change its value. The circle diameter will change accordingly.

See the animated sample:

Parametric dimension

ACAD2010

* CAD

23.11.2009 7676×

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applies to: AutoCAD 2010 ·

See also:
Tip 11497:	Automatic grouping of drawing objects.
Tip 11354:	Animate dyn.block parameters and dim.constraints in AutoCAD DWGs.
Tip 8846:	Parametric triangles - isosceles, right-angled, equilateral
Tip 7824:	Using constraints for simulations of mechanisms in AutoCAD.

Selected tip: How to construct a line perpendicular to an arc?

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