'OSNAP
Defines object snap points.
You can specify object snap points at END[point],
CEN[ter], NEA[rest],
or MID[point] of objects. When
you draw objects in this mode, the pointer snaps to the specified points.
You can specify more than one OSNAP
mode at the same time (END and
MID, for example, or END,
MID, CEN).
However, when you specify a mode, previous modes are automatically turned
off.
Turn off all OSNAP modes by
entering the mode NONE.
See also 'SNAP,
'GRID,
'ORTHO,
Transparent
Commands.