Osnap Settings

When you use any of the object snap settings, AutoSnap displays a marker and
a Snap tip when you move the cursor over a snap point.
1. Choose        Tools, Options...
2. Select          the Drafting tab in the Options dialog box.
3. Change        settings and choose OK.
The following are object snap modes:
CENter            Center of Arc or Circle
ENDpoint        Closest endpoint of Line/Arc
INSertion         Insertion point of Text/Block/Shape/ Attribute
INTersection    Intersection of Lines/Arcs/Circles
MIDpoint         Midpoint of a line/Arc or midpoint
NEAerst           Nearest point on a Line/Arc/Circle/Point
APParent          Int Finds where two entities would intersect
NODe               Nearest point entity (or Dimension defini tion point)
NONe               None (off)
PERpendicular Perpendicular to a Line/Arc/Circle
QUAdrant        Quadrant point on an Arc/Circle
QUIck              Quick mode (first find, not closest)
TANgent           Tangent to Arc or Circle