I guess I didn't make the issue clear... For instance, the "centerline" available in TC18 Deluxe is not a centerline ; it is simply a dashed line. When I call up the "Line Style Table" which lists the different types of lines with accompanying numbers for each, I can "edit" them, but the editing only changes the size of the various dashes, not their format. For instance, selecting the CENTER line property in a drawing yields simply a dashed line consisting of dashes of equal length, and no manipulation of the numbers shown in the Line style table changes that. In my experience a center line is shown as a long dash, then a short dash, then another long dash, short dash, and so on. Any changes to it in the line style table simply result in longer or shorter dashes, but always of equal length. In fact, I can select all of the numbers shown in the table for any type of line and not change the type of line created. I cannot believe there is no option available to change one of them, or even create a new style.
Thanks for your interest, Bill Vlymen