Technical data

Using Drafting Settings
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Using Reference Points in the Drawing
AutoCAD Land Development Desktop provides tools to help
you specify points precisely for accurate placement of objects
and for reference.
Object Snaps
You can use object snaps (osnaps) to move the cursor to defined
points on objects, for example, the center of a circle, the midpoint of
a line, or the intersection of two lines. For example, you can start a
new line from the exact endpoint of another line. Set the Object snaps
you want to use in the Drafting Settings dialog box, which is displayed
when you select Drafting Settings on the Tools menu.
During a drawing session, if you do not want to use an osnap that you
set, you can turn it off temporarily before you select a point. Double-
click OSNAP on the status bar, or press F3 to turn the settings off.
Double-click again or press F3 to turn the same settings back on. If you
have not specified any object snap modes, then the Drafting Settings
dialog box is displayed so you can specify the osnap modes to use.