Xerox 6030 User Manual page 306

Dashstyle
Example
Broken line style
Dot
NO WRAP
Each dot represents the start of the broken line.
Lines printed with the use of the broken line style shown in
the example will be printed as a non-broken line, as shown
in the illustration on the left. This is due to the fact that the
dot appears before the line is broken, and this constitutes the
starting point for printing another line.
WRAP
Each dot represents the direction in which the broken line
must be printed.
Lines printed with the use of the broken line style shown in
the example will be printed as shown in the illustration at
the left .