KDIST
KDIST, KP1, KP2
Calculates and lists the distance between two keypoints.
KP1First keypoint in distance calculation. If
KP1= P, graphical picking is enabled and all remaining command fields are ignored (valid only in the GUI).KP2Second keypoint in distance calculation.
Notes
KDIST lists the distance between keypoints KP1
   and KP2, as well as the current coordinate system offsets from
   KP1 to KP2, where the X, Y, and Z locations
   of KP1 are subtracted from the X, Y, and Z locations of
   KP2 (respectively) to determine the offsets. KDIST
   is valid in any coordinate system except toroidal (CSYS,3).
KDIST returns a variable, called "_RETURN," which contains the distance value. You can use this value for
   various purposes; for example, to set the default number of line divisions to be generated along
   region boundary lines (ESIZE,_RETURN).
   In interactive mode, you can access this command by using the Model Query Picker
   (), where you can also access
   automatic annotation functions, and display the value on your model. 
This command is valid in any processor.