## OSNAP

The F3 key activates/deactivates the osnap mode.

To change the osnap mode:

1. When a command ask for a point press CTRL + right mouse button to choose a different snap mode.
2. When a command ask for a point type in the text window:
   "NONE" = no snap
   "END" = endpoints of each segment
   "END_PL" = endpoint of the entire polyline
   "MID" = midpoint
   "CEN" = center (centroid)
   "NOD" = point object
   "QUA" = quadrant point
   "INT" = intersection
   "INS" = insertion point
   "PER" = perpendicular point
   "TAN" = tangent
   "NEA" = closest point
   "APP" = apparent intersection
   "EXT" = Extension
   "PAR" = Parallel
   "INT_EXT" = intersection on extension
   "PR" = progressive distance (may be followed by a number to set a progressive distance different from default)
3. Using the setvar command to set the OSMODE variable with a combination a bit using the following schema:
   0 = None
   1 = endpoint
   2 = midpoint
   4 = center (centroid)
   8 = point object
   16 = quadrant point
   32 = intersection
   64 = insertion point
   128 = perpendicular point
   256 = tangent
   512 = closest point
   1024 = clear all object snaps
   2048 = apparent intersection
   4096 = extension
   8192 = parallel
   16384 = osnap disabled
   65536 = progressive distance
   131072 = intersection on extension
   2097152 = endpoints of the entire polyline
4. Run DSETTING command