Good tip Dave (djw2k3).
I played with the file you suggested & it works a treat.
I have copied the contents of "swlines.lin" below. The positive number is line length & negative number is space "length".
These cannot be changed on the fly though, SW has to be restarted before changes take effect. Hopefully SW will create a bigger variety of selectable lines in future versions.
;;
;; Based on AutoCAD Ver. 13.0's Line Styles Format
;;
;; A length/space of '1.0' is equivalent to .2 inches.
;;
*CONTINUOUS,Solid
A,12
*HIDDEN,Dashed
A,.25,-.125
*PHANTOM,Phantom
A,1.25,-.25,.25,-.25,.25,-.25
*CHAIN,Chain
A,1.25,-.25,.25,-.25
*CENTER,Center
A,3,-.25,.25,-.25
*STITCH,Stitch
A,0,-.125
*CHAIN_THICK,Thin/Thick Chain
A,1.25,-.25,.25,-.25
B,THICKENDS