Basic 2D commands of Autocad

Basic 2D commands of Autocad 

Line

This command use to draw the lines ,you can choose the command from toolbar or write L and press enter.

Command= L <enter>

Polyline

          Allow for the sequential drawing of one or more straight lines.Once engaged this command elicits  a prompt of from point at which point the user specifies a starting point for a line, or they may press RETURN, which starts the line at the end of the previous line or arc that was drawn. Next, the prompt "To point:" is displayed, allowing the user to specify a sequence of points to which the line will extend. They may also  type the letter C to close the polygon, or the letter U to undo the previous line segment, or they may simply press RETURN to complete the command.

Command =PL <enter>

 Circle

            Draws a circle by letting the user specify the center point, then dictating the circle 's size by entering a value either the circle 's diameter and radius.

Command = c <enter>

Arc

     This command draws arcs like half circle.
          The various methods for constructing arcs with this command.

1. Specify three different points .
2. Starting point, center, and end point.
3. Starting point, center and included angle.
4. Starting point, center, and length of chord.
5. Starting point, ending point,and radius
6. Starting point, ending point, and starting direction,and finally.
7. Starting point and direction of previous line or arc, plus ending point.

Command=A <enter>

Erase

          This command use to  removes a selected entities.

Command= E <enter>

Move

           The user may dictate the direction and length of a move of specified objects.

Command= M <enter>

Copy

     This command is use to copy the objects. You can choose the command from toolbar or write co with keyboard.

Command= co <enter>

Circle

            This command is use to draw the circle, you can choose the command from toolbar or write the c with keyboard.

Command= c <enter>

Rectangle

               This command is use to draw the rectangle, you can choose the command from toolbar or write rec with keyboard.

Command= rec <enter>

Rotate

             The user can be rotate an object choosing with this command. Negative angle will provide a clockwise rotation, while a positive angle gives a counterclockwise rotation.

Command =RO <enter>

Mirror

             This command produces a mirror copy of a selected object group by specifying the two ends of the mirror line. Then, the mirrored objects may be deleted or kept, depending upon the user preference.

Command = MI <enter>

Trim

          This command trims part  of certain object in a drawing in order to finist them precisely at some cutting edges that are established by one or more other objects . One or several lines, circles ,arcs or polylines must be identified to serve as cutting edges, which may be selected by any of the methods available.Next , pointing is used to select the parts of the objects that are to be trimmed.

Command= TR <enter> <enter>
 

Extend 

               Complementing the Trim command , Extend operates similarly, but the selected lines are extended to end exactly at the specified boundary edges.

Command =EX <enter>

Offset

           Constructs a new entity parallel to an existing one. This could be a single line , polyline ,arc or circle.

Command=O <enter>

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