2004

Table Of Contents
Snap to Locations on Objects (Object Snaps) | 235
Use Running Object Snaps
If you need to use the same object snap repeatedly, you can set it as a running
object snap, which means it stays on until you turn it off. For example, you
might set Center as a running object snap if you need to connect the centers
of a series of circles with a line. As with single object snaps, the aperture, or
target box, indicates that an object snap is on and identifies the selection
area. You can change the size of the target box.
When you turn on multiple running object snaps, AutoCAD uses the object
snap most appropriate to the object you select. If two potential snap points
fall within the selection area, AutoCAD snaps to the eligible point closest to
the center of the target box.
Note If several running object snaps are on, you need to check which one is in
effect when you specify a point. If more than one object snap is eligible at a given
location, press the
TAB key to cycle through the possibilities before you specify
the point.
Object Snap Restrictions
Most of the object snaps that are described here affect only objects visible on
the screen, including objects on locked layers, layout viewport boundaries,
and polyline segments. You cannot snap to objects that are not visible, such
as objects that are not displayed, objects on turned-off or frozen layers, or the
blank portions of dashed lines.
Object snaps work only when AutoCAD prompts for a point. If you try to use
an object snap at the Command prompt, AutoCAD displays an error
message.
To snap to a geometric point on an object
1 At the prompt for a point, hold down
SHIFT and right-click in the drawing
area. Then choose the object snap you want to use.
2 Move your cursor over the desired snap location.
If AutoSnap is on, your cursor automatically locks onto the snap location
you selected, and a marker and tooltip indicates the snap point.
3 Select an object.
The cursor snaps to the eligible location closest to your selection. Press
SHIFT and right-click (for object snap menu).