For example, if you are working on a land scape drawing of a five acre parcel, you need to see the dimension of a landscape element (i.e. a tree) is 40' in dimeter. You also need to be able to size elements in their "in real life" dimensions or scale. So to scale the diameter of the tree or even a room in a building, you need to be able to enter 40'.
Lastly, when modifying the document setup, the height and width of the document (i.e. 36" x 24") needs to be available.
Being able to read DWG formats, requires supporting the basic functionality.
Chuck Burr
chuc...@mac.com