Saturday, February 7, 2009

Muodify Objects


You can easily modify the size, shape, and location of objects.
Overview of Modifying Objects
With AutoCAD, you can easily modify the size, shape, and location of objects. You can either enter a command first and then select the objects to modify, or you can select the objects first and then enter a command to modify them. Double-clicking an object displays the Properties palette or, in some cases, a dialog box that is specific to that type of object.
Remove Objects
There are several methods for removing objects from your drawing.
You can remove objects from your drawing using several methods, including
Erasing them with ERASE
Cutting them to the Clipboard
Pressing DELETE
ERASE works with all the available object selection methods.
You can restore accidentally erased objects using UNDO. The OOPS command restores all objects deleted by the most recent use of ERASE, BLOCK, or WBLOCK.
To remove the plus-shaped markers called blips, refresh the screen with REDRAW.
To remove unused named objects, including block definitions, dimension styles, layers, linetypes, and text styles, use PURGE
Move Objects
You can move objects in your drawing without changing their orientation or size.
You can move objects without changing their orientation or size. By using coordinates and object snaps, you can move objects with precision. You can also recalculate objects by changing coordinate values in the Properties palette.
In this example, you move the block representing a window. After choosing Move, select the object to be moved (1). Specify the base point for the move (2) followed by the point of displacement (3). The object is moved from point 2 to point 3.
You can also move an object using a relative distance by entering coordinate values for the first point and pressing ENTER for the second point of displacement. This instructs AutoCAD to use the coordinate values as a relative displacement rather than a base point. The objects you selected are moved to a new location determined by the relative coordinate values you entered. Do not include an @ as you normally would for relative coordinates, because a relative coordinate is expected.
You can also use STRETCH to move objects if all their endpoints lie entirely within the selection window. Turning on Ortho mode or Polar Tracking helps you move
the object at a specific angle.

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