Summary: I would LOVE the ability to change the Line Scale of all objects in the drawing at the same time.
Description: I envision it working similar to the SETBYLAYER command. You simply select the objects and dictate the scale. Even if the objects are in a block definition or were different types of objects you could change the scale of every object in the drawing all at once.
Product and Feature: AutoCAD Architecture - Display System
Submitted By: Floyd Putnam on 08/23/2012