I am using DraftSight for Mac, V1R1.3. I have created a new RichLine Style (Options > Drafting Styles > RichLine) and have exported it to the RichLine Styles folder using the same name for the filename as for the RichLine Style itself (The Export function automatically appends an ".mln" suffix to the filename.) and I have made my newly defined RichLine Style active (click "Activate" button). I can now go to the drawing window and create a RichLine using the newly defined RichLine Style. However, if I then want to modify the RichLine Style (Options > Drafting Styles > RichLine), none of the options are enterable. The Line Properties section is greyed out and the New and Delete buttons are dimmed, and the Display and Cap Ends dialogs are also disabled. The only way I can modify the RichLine Style is if I first delete the RichLine I drew in the drawing window. Thank you for your attention to this issue.