SPLFRAME system variable
Function Description:
The SPLFRAME system variable is used to control the display of helixes and smoothed mesh objects.
Type : Integer 
Saved in : Drawing 
Initial value : 0 
Range : 0,1 
System Variable Value:
0 : do not display the control polygon for helixes
     Display smoothed mesh object(if mesh objects has smoothed )
     Do not display invisible edges for 3D faces or multiple faces meshes
1 : display the control polygon for helixes
     Display the mesh object without smooth(even if mesh objects has smoothed )
     Display edges for 3D faces or multiple faces meshes