Create Arc Length Dimensions; Modify Existing Dimensions - Autodesk 057B1-41A111-1001 - AutoCAD LT 2010 User Manual

Create Arc Length Dimensions

Arc length dimensions measure the distance along an arc or polyline arc
segment.
Typical uses of arc length dimensions include measuring the travel distance
around a cam or indicating the length of a cable. To differentiate them from
linear or angular dimensions, arc length dimensions display an arc symbol
by default.
The arc symbol, also called a hat or cap, is displayed either above the dimension
text or preceding the dimension text. The placement style can be changed on
the New/Modify Dimension Style dialog box, Symbols and Arrows tab.
The extension lines of an arc length dimension can be orthogonal or radial.
NOTE Orthogonal extension lines are displayed only when the included angle of
the arc is less than 90 degrees.

Modify Existing Dimensions

You can modify all components of the existing dimension objects in a drawing
either individually or by using dimension styles.
410 | Chapter 9 Annotate Drawings