Arc length dimension is available for measuring the arc length of arc or polyline arc segment. ZWCAD creates arc length dimension by specifying extension line position directly after selecting arc by default. And use an arc symbol as arc length dimension logo, which is differing from linear dimension and angular dimension.
Arc symbol of arc length dimension displays both in front of the dimension text and above it, which is adjustable from "Other Items" tab either in "Create New Dimension Style" dialog box or "Modify Dimension Style" dialog box.
Additionally, orthogonal or radial extension line is available for arc length dimension, only the included angle of the arc segment selected for creating arc length dimension is smaller than 90 degree can display it's orthogonal extension line.
To create an arc length dimension
Choose Dimension > Arc Length.
Select an arc or polyline arc segment.
Specify a point to position the arc length dimension.
Command line DIMARC
DIMARC: Creates an arc length dimension for an arc or polyline arc segment
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
DIMARCSYM: Specifies the location of the arc symbol in an arc length dimension
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