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The Break command enables you to break (remove part of) an object by defining two break points.

The Lengthen command can often be used instead of either the Trim or Extend commands. Indeed the end result is exactly the same. The Lengthen command can be used to either lengthen or shorten Lines, Arcs, open Polylines, elliptical Arcs and open Splines without the use of cutting or boundary edges.

If the line you are trying to extend does not intersect with the boundary line, you can use the "Edge" option to toggle Edgemode to "Extend" (the default is "No Extend").

The Fillet command is a very useful tool which allows you to draw an arc between two intersecting lines or adjacent polyline segments.

Although the Stretch command can be very useful, it has largely been superseded by the use of "Grips" which allow this sort of modification to be made much more intuitively.

The Stretch command can be used to move one or more vertices of an object whilst leaving the rest of the object unchanged. In the example below, a rectangle has been stretched by moving one vertex to create an irregular shape.

The Rotate command allows an object or objects to be rotated about a point selected by the user. AutoCAD prompts for a second rotation point or an angle which can be typed at the keyboard.

The Move command works in a similar way to the Copy command except that no copy is made, the selected object(s) is simply moved from one location to another.

The Trim command can be used to trim a part of an object.

The Mirror command allows you to mirror selected objects in your drawing by picking them and then defining the position of an imaginary mirror line using two points.

The Array command makes multiple copies of selected objects in a rectangular matrix (columns and rows) or a polar (circular) pattern. This command has been completely transformed in AutoCAD 2000i

The Copy command can be used to create one or more duplicates of any drawing object or objects which you have previously create

The Erase command is one of the simplest AutoCAD commands and is one of the most used.

This exercise is designed to help you test out your basic AutoCAD skills. You'll need an understanding of the Draw and Modify tools and how to use co-ordinates.

You may have noticed during the command sequences for the Trim and Extend commands that you have the option to "shift-select". This feature is new to AutoCAD 2000i and it enables you to extend while using the Trim command and to trim while using the Extend command.

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