Use the Lines tab of the Modify DWG/DXF Export Setup dialog to specify the linetype scale that will control how Revit linetype definitions are exported.
You can also map Revit line patterns to specific DWG/DXF linetypes as needed.
In CAD applications, linetypes determine the particular dash-dot sequence, the relative lengths of dashes and blank spaces, and the characteristics of any included text or shapes in lines.
In Revit, these properties are defined as line patterns, which are specified in the object styles assigned to element categories. These patterns can be overridden for a selected element in a specific view.
In AutoCAD, the PSLTSCALE parameter controls paper space linetype scaling. A value of 0 indicates no special linetype scaling.
Linetype dash lengths are based on the drawing units of the space (model or paper) in which the objects were created. A value of 1 indicates that viewport scaling governs linetype scaling.
In Revit, the Set Linetype Scale option changes the default behavior of the exported DWG files. Some lines that you would expect to be dashed may now appear solid or in a different scale in either Model or Sheet View in AutoCAD. Regardless of the option you choose, the DWG linetype definitions are created so that a dashed line always begins and ends with a dash.
Select one of the following options to control the LTSCALE and PSLTSCALE settings in AutoCAD and to control how linetype definitions are exported from Revit:
By default, each Revit line pattern listed in the mapping table has a corresponding DWG linetype generated automatically upon export. This linetype matches the Revit line pattern.
To map a Revit line pattern to a different DWG line type, do the following:
To change all the values in the table back to {Automatically generate linetype}, click Reset All.