You can create radial dimensions for circles or arcs to measure their radial. The radial dimension is a radial dimension line with an arrowhead that points to a circle or arc. To display centerlines or a center mark, set the system variable DIMCEN to nonzero.
If the Text Placement in the dimension style is set to Over the Dimension Line, with a leader, then the dimension is applied along with a leader line.
Both center marks and lines apply only to radius and diameter dimensions. They are created only when you place the dimension outside the circle or arc. The size of the centerline is the distance of the centerline segment that extends outside the circle or arc, shown as the following illustration:
To create a radial dimension
Choose Dimensions > Radius.
Select the arc or circle.
Specify the dimension line location.
Command line DIMRADIUS
Select the circle (A), and then specify the dimension line location (B).
Jogged dimension is namely jogged radius dimension, which is also called scaled radius dimension. User can specify center position to place the origin of dimension for replacing center point of circle or arc within radius dimension. DIMJOGGED command is useful for creating dimensions in case that the center of circle or arc to be dimensioned is located outside the layout and can't be displayed in its actual position either.
You can set the angle of jogged radius from "Other Items" tab either in "Create New Dimension Style" dialog box or "Modify Dimension Style" dialog box.
For a jogged radius dimension having been created, you can modify it's jog and center position by means of grip editing, Properties palette and executing STRETCH command.
To create a jogged radius dimension
Choose Dimension > Jogged.
Select a circle or an arc.
Select center position as the dimension origin.
Specify a point to position the jog symbol.
Command line DIMJOGGED
DIMCENTER: Creates the center mark or the centerlines of circles and arcs
DIMDIAMETER: Creates diameter dimensions for circles and arcs
DIMJOGGED: Creates jogged dimensions for circles, arcs, and polyline arc segments
DIMRADIUS: Creates radial dimensions for circles and arcs
QDIM: Quickly creates a dimension
System Variables Reference
DIMATFIT: Determines how dimension text and arrows are arranged when space is not sufficient to place both within the extension lines
DIMCEN: Controls drawing of circle or arc center marks and centerlines by the DIMCENTER, DIMDIAMETER, and DIMRADIUS commands
DIMJOGANG: Specifies the angle of the transverse segment of the dimension line in a jogged radius dimension
DIMJUST: Controls the horizontal positioning of dimension text
DIMTAD: Controls the vertical position of text in relation to the dimension line
DIMTIH: Controls the position of dimension text inside the extension lines for all dimension types except ordinate
DIMTMOVE: Sets dimension text movement rules
DIMTOFL: Controls whether a dimension line is drawn between the extension lines even when the text is placed outside
DIMTOH: Controls the position of dimension text outside the extension lines
DIMUPT: Controls options for user-positioned te