Creates a table legend of linetypes in the drawing.
Keyboard Command: GenLinLeg

Procedure:
- Open the drawing containing the linetypes to evaluate.
- Initiate the command from the menu, ribbon or command.
- Optionally select fields to included in the table.
- Optionally change additional parameters.
- Click the button to begin processing.
Notes:
- When the dialog appears, only linetypes actually used in the drawing are selected.
- To achieve linetypes in the table, this tool must build a block representation for each linetype.