REGULAR lets you dimension the radius of a circle or arc
that you created in the same view as the one in which you
are dimensioning.

Select the arc or circle to dimension.

Indicate the dimension text placement using an option from
the Position Menu.

If you place the text outside the arc or circle, choose a
side for the leader to display:

LEFT draws a leader from the left side of the dimension
text, and RIGHT draws a leader from the right side of the
dimension text.

CADKEY dimensions the radius and prefixes it with the 
ANSI-standard radius symbol, R. CADKEY draws leader lines,
dimension text, and arrows according to the current 
settings under DETAIL, SET.

If you make a mistake, choose UNDO in the Break Area or
press (Alt)-(I). CADKEY deletes the dimension and leader
lines and you can indicate another dimension text 
position.
