You can draw objects
at specific angles or in specific relationship to other objects
along specified directions called alignment paths.
AutoTrack™ helps you
draw objects at specific angles or in specific relationships to
other objects. When you turn on AutoTrack, temporary alignment paths
help you create objects at precise positions and angles. AutoTrack
includes two tracking options: polar tracking and object snap tracking.
You can toggle AutoTrack
on and off with the Polar and Otrack buttons on the status bar.
Use temporary override keys to turn object snap tracking on and
off or to turn off all snapping and tracking. See the keyboard illustration
in Override Object Snap Settings.
Object snap tracking
works in conjunction with object snaps. You must set an object snap
before you can track from an object's snap point.
Object Snap Tracking
Use object snap tracking to track along alignment
paths that are based on object snap points. Acquired points display
a small plus sign (+), and you can acquire up to seven tracking points
at a time. After you acquire a point, horizontal, vertical, or polar
alignment paths relative to the point are displayed as you move
the cursor over their drawing paths. For example, you can select
a point along a path based on an object endpoint or midpoint or
an intersection between objects.
NoteYou can track Perpendicular
or Tangent object snap from the last picked point in a command even
if the object snap tracking is off.
In the following illustration, the Endpoint
object snap is on. You start a line by clicking its start point
(1), move the cursor over another line's endpoint (2) to acquire
it, and then move the cursor along the horizontal alignment path
to locate the endpoint you want for the line you are drawing (3).
Change Object Snap Tracking
By default, object snap tracking is set to orthogonal.
Alignment paths are displayed at 0, 90, 180, and 270 degrees from
acquired object points. However, you can use polar tracking angles
For object snap tracking, object points are
automatically acquired. However, you can choose to acquire points
only when you press Shift.
Change Alignment Path Display
can change how AutoTrack displays alignment paths, and you can change
how object points are acquired for object snap tracking. By default,
alignment paths stretch to the end of the drawing window. You can
change their display to abbreviated lengths, or no length.
Tips for Using Object Snap
As you use AutoTrack (polar tracking and object
snap tracking), you will discover techniques that make specific
design tasks easier. Here are a few you might try.
- Use Perpendicular, End, and Mid object
snaps with object snap tracking to draw to points that are perpendicular
to the end and midpoints of objects.
- Use the Tangent and End object snaps
with object snap tracking to draw to points that are tangent to
the endpoints of arcs.
- Use object snap tracking with temporary
tracking points. At a point prompt, enter tt, then specify
a temporary tracking point. A small + appears at
the point. As you move your cursor, AutoTrack alignment paths are
displayed relative to the temporary point. To remove the point,
move the cursor back over the +.
- After you acquire an object snap point,
use direct distance to specify points at precise distances along
alignment paths from the acquired object snap point. To specify
a point prompt, select an object snap, move the cursor to display
an alignment path, then enter a distance at the Command prompt.
NoteThe direct distance
entry method is not available while you are using the temporary
override key for object snap tracking.
- Use the Automatic and Shift to Acquire
options set on the Drafting tab of the Options dialog box to manage
point acquisition. Point acquisition is set to Automatic by default.
When working in close quarters, press Shift to temporarily avoid
acquiring a point.
To turn on and turn off
object snap tracking
To change AutoTrack settings