Developing Drawing Strategies: Part 2 - AutoCAD 2011 and AutoCAD LT 2011: No Experience Required - page 172

2. Check to make sure that all buttons on the left side of the status bar,
except Ortho Mode, Object Snap, and Dynamic Input, are still in their
off positions. Start the LINE command.
W a y s t o U s e t h e o B j e C t s n a p t o o l s
You can access the Object Snap tools in several ways:
The Object Snap context menu provides access to the object snaps. To
open this menu, hold down the Shift key or Ctrl key and right-click.
If you're using a mouse with a scroll wheel or a three-button mouse, you
might be able to open the Object Snap menu by clicking on the wheel or
the middle mouse button. If this doesn't work, set the MBUTTONPAN
variable to zero. (Enter MBUTTONPAN ↵ 0 ↵ .) Be aware that you will no
longer be able to pan by holding down the scroll wheel.
When the menu bar is displayed, the Object Snap toolbar can be dis-
played from the Tools Menu ➢ Toolbars ➢ AutoCAD ➢ Object Snap.
In most cases, you can enter the first three letters of an osnap to
activate it, as in END ↵ for Endpoint.
You need to start the threshold 3 ″ (76 mm) below the bottom jamb
and inline with the outside wall line. Unfortunately, there is no fea-
ture to snap the cursor to at that point. The techniques that you've
previously used would require offsetting the jamb line or starting
the line at the jamb and drawing an overlapping line 3 ″ (76 mm)
downward. Both of these methods would require you to erase the
unnecessary line after the threshold is complete.
Instead of wasting time drawing and then erasing lots of unneces-
sary line work, you will begin using the Object Snap Tracking tool.
This tool will help eliminate the need to create unnecessary geom-
etry. Using the Object Snap Tracking tool requires you specify a loca-
tion in the drawing area, called a temporary tracking point , relative
to existing features or other locations.
3. Click the Object Snap Tracking button on the status bar.
In this case, because the threshold starts 3 ″ (76 mm) below the
outside corner of the lower jamb, you'll use that corner as the tempo-
rary tracking point for the start point of the line.