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You can modify a dimension by dragging its text, arrow head, or dimension line.
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You can change a dimension from driving to driven, or from driven to driving. Select a dimension. From the Dimension ribbon bar, click the Driving/Driven button.
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SmartDimension dimensions lines, arcs, circles, and curves. You can change the dimension being placed with the Length, Angle, Radius, and Diameter buttons on the ribbon. Click on a line, then click the Angle button to change from Length to Angle.
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The appearance of a dimension is defined by its style. From the Format menu, click Style. Choose dimension as the Style Type. Then choose a style from the list to modify, or click the New button to create a new style.
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You can place horizontal and vertical dimensions on a line with SmartDimension, even if the line is at an angle. When placing the dimension, hold the Shift key for a horizontal or vertical dimension.
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The Dimension command on the Dimension toolbar allows you override a driven dimension with a text string.
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Use the Dimension Along custom command to define or apply a constraint on the position of objects on a b-spline curve a given distance above or below other objects.