User Guide

Correlating an Image After Insertion
You can adjust the size and location of an image at any time after inserting
it into a drawing.
For instance, you may need to correct distortions caused by scanning errors.
There are several ways to ensure precise correlation of an inserted image:
■ Match points on an image to points in your drawing in order to scale or
rotate a raster image.
■ Displace an image, to move it in reference to existing raster or vector
entities without scaling or rotating it.
■ Scale a raster image without rotating it.
■ Rubbersheet an image to eliminate distortion and stretch or shrink a
portion of your image to align with selected control points.
Matching Image Points
You can match points between two images or between an image and a vector
drawing to change the image scale and position.
The image size and orientation change to align the selected match points.
To match image points
1 Click Image menu ➤ Correlate ➤ Match.
2 Select one or more images to scale and rotate by clicking the image frames,
then press Enter.
3 Specify the first source point on the selected image.
NOTE You can select a point on the image frame by using object snaps, or
you can select points on specific raster entities by using raster snaps.
4 Specify the destination point where you want the first source point to
move to.
5 Specify the second source point on the selected image.
6 Specify the destination point where you want the second source point
to move to.
28 | Chapter 2 Inserting and Correlating Images