Problem

Where are the default linestyle codes (1-7) that Interplot uses? And how can they be modified?
 

Solution

These linestyles are located in a resource file (.rsc) delivered with MicroStation; the resource file is located in the following directory: C:\Documents and Settings\All Users\ApplicationData\Bentley\WorkSpace\System\Symb\lstyle.rsc

To edit/modify them:
1) Choose "Element>Line Styles>Custom/Edit" (contact Platform support about the distance,space combo information)
-or-
2) You can modify these and Custom Line styles via a design script comparison and/or assignment keyword (style)
If ((level==1) and (style==7)) then
style = 3 -->(or style = 'dashed' )
endif