Autotek autocad raster design 2010 用户手册

NOTE Setting the correlation defaults can save you time if you have multiple
images that require the same insertion point, scale, rotation, and 

 (page

387).

1 Click Image menu  ➤  Options. The 

 (page 351)

dialog box is displayed.

2 Click the Image Defaults tab.

3 Under Insertion Point, type default insertion point coordinates in the X

and Y boxes. The precision of this point depends on the precision value
in the AutoCAD Units Control dialog box.

4 If you want to set an elevation for the frame, then type the elevation in

the Z box.

NOTE This value is useful if you want to establish the elevation of a floorplan
image, for example.

5 In the Scale box, type a default scale. Image scale does not change the

scale of the vector drawing.

6 In the Rotation box, type a default rotation angle. The unit of

measurement depends on the selected value in the AutoCAD Units
Control dialog box.

7 Under Density , in the Value box, type a default density. This is usually

 (page 395). For example, if the majority of your

images are scanned at 300 dots per inch, type 300 in this box.

8 Under Density, in the Units box, type a default density unit. For example,

if the majority of your images are scanned at 300 dots per inch, set Inches
as the default.

9 Under Vertical Units, select either Meters or US Survey Feet.

10 Click OK to accept the defaults.

Menu

Image  ➤  Options

246 | Chapter 10   Configuring Raster Design