Gerber OMEGA CP Reference Manual page 177

Arrowhead features:
♦ Extension lines travel past dimension lines by a default
distance of 0.18".
♦ The arrow filled, arrow blanked, arrow closed and arrow
open all have an 18 to 20 degree angle. These types have a
default arrow height (base to tip) of 0.18"
♦ The default distance along a side of the right angle arrow
is 70% of 0.18" or 0.126".
♦ The open 30 degree arrow has a default height (base to tip)
of 0.18".
♦ The oblique and architectural ticks are both at 45 degrees
and each have a default total length of two times 70% of
0.18" or 0.252". The architectural tick has a width of 0.027",
15% of 0.18".
♦ The default diameter for dot filled, blanked and origin is
0.18"
♦ The default length of a side for the box filled and box
blanked is 0.18".
♦ The datum triangles are equilateral triangles with a default height of 0.18".
♦ The integral exactly fits in a circle with a default diameter of 0.18" inches. The integral
is composed of two arcs, each arc subtended by a chord which is one half of the same
diameter line. The height of the arc from the chord is 15% of the radius or 0.0135".
Units – The Units drop down list allows the user to set the dimensioning units and the
units label for distance (if using horizontal, vertical or aligned dimensions) or angular
dimensions (if using angular dimensions).
163