Line Drawing - Termcap Reference
| 
                                                         Name  | 
                                                    
                                                         Description  | 
                                                
| 
                                                         GS=str  | 
                                                    
                                                         Start graphics mode  | 
                                                
| 
                                                         GE=str  | 
                                                    
                                                         End graphics mode  | 
                                                
| 
                                                         G1=str  | 
                                                    
                                                         Upper-right corner (┐)  | 
                                                
| 
                                                         G2=str  | 
                                                    
                                                         Upper-left corner (┌)  | 
                                                
| 
                                                         G3=str  | 
                                                    
                                                         Lower-left corner (└)  | 
                                                
| 
                                                         G4=str  | 
                                                    
                                                         Lower-right corner (┘)  | 
                                                
| 
                                                         GH=str  | 
                                                    
                                                         Horizontal line (─)  | 
                                                
| 
                                                         GV=str  | 
                                                    
                                                         Vertical line (│)  | 
                                                
| 
                                                         GR=str  | 
                                                    
                                                         Connect from right (├)  | 
                                                
| 
                                                         GL=str  | 
                                                    
                                                         Connect from left (┤)  | 
                                                
| 
                                                         GU=str  | 
                                                    
                                                         Connect from top (┴)  | 
                                                
| 
                                                         GD=str  | 
                                                    
                                                         Connect from bottom (┬)  | 
                                                
| 
                                                         GC=str  | 
                                                    
                                                         Connect center (┼)  | 
                                                
| 
                                                         GG=num  | 
                                                    
                                                         Display positions used by "GS" and "GE"  | 
                                                
The start and end graphic modes are used whenever PRO/5 will print one of the graphics sequences. Problems similar to those in attribute setting exists.
If it is possible to print the box characters without a special mode, the GS and GE capabilities should be left blank. If none of the strings are loaded, PRO/5 will default to "*" for the corners, "|" for the vertical lines, and "-" for the horizontal lines.
If "GG" is specified, this is the same as not having any special graphics characters. PRO/5 cannot use attributes that require display positions.