How to make, or modify dimension lines to be wider, or thicker in draft?
Solution1. If modifying individual, or a select few existing dimensions, first ID the dimension(s), select Properties for the selected dimension(s). Next go to the Lines and Coordinate tab, then under the category Dimension Lines, edit the Width field to the determined thickness.
2. Or edit, or create an existing style by going to dimension styles and making the same modification desired and save.