LSLK, Type, LSKEY
Selects those lines containing the selected keypoints.
TypeLabel identifying the type of line select:
S  | —  | Select a new set (default).  | 
R  | —  | Reselect a set from the current set.  | 
A  | —  | Additionally select a set and extend the current set.  | 
U  | —  | Unselect a set from the current set.  | 
LSKEYSpecifies whether all contained line keypoints must be selected [KSEL]:
0  | —  | Select line if any of its keypoints are in the selected keypoint set.  | 
1  | —  | Select line only if all of its keypoints are in the selected keypoint set.  |