#!F-adobe-helvetica-medium-r-normal--18*
#!N 
#!CDarkGreen #!N  #!Rzooming Zooming into and 
out of the Image #!N #!EC #!N #!N To zoom in 
or out (relative to the center of the Image window): #!N 
#!I0 #!N  #!F-adobe-times-medium-r-normal--18*   #!N #!N #!I30 #!N 1. Select the  #!F-adobe-times-bold-r-normal--18*   
Zoom #!EF mode in the  #!F-adobe-times-bold-r-normal--18*   Mode #!EF option box, or 
use the  #!F-adobe-times-bold-r-normal--18*   Ctrl+Z #!EF accelerator key. #!N #!I30 #!N 2. 
To zoom in, press the  #!F-adobe-times-medium-i-normal--18*   left #!EF mouse button; to 
zoom out, press the  #!F-adobe-times-medium-i-normal--18*   right #!EF mouse button. Drag the 
mouse in the image area. This causes an overlay image of 
a rectangle to appear. As you move the mouse pointer away 
from the center of the window, the rectangle enlarges. As you 
move the mouse pointer towards the center of the window, the 
rectangle shrinks. Releasing the mouse button causes the image to zoom 
in or out, depending on which mouse button is pressed. If 
the left button (zoom in) is pressed, the portion of the 
image inside the rectangle is enlarged to fill the Image window. 
If the right button is pressed (zoom out), the image displayed 
in the Image window is reduced to the size of the 
rectangle. Note: You can also enable  #!F-adobe-times-bold-r-normal--18*   Zoom #!EF mode by 
using the  #!F-adobe-times-bold-r-normal--18*   intrctnMode #!EF parameter to the Image tool (see 
Image in IBM Visualization Data Explorer User's Reference). #!N #!I0 #!N 
#!EF #!N #!N #!N For both orthographic and perspective projection, zooming 
in makes the object appear larger in the Image window, while 
zooming out makes it appear smaller. However, the way that this 
is accomplished is different depending on which projection method is selected: 
#!N #!I0 #!N  #!F-adobe-times-medium-r-normal--18*   #!N #!N #!I30 #!N o While using 
perspective projection, zooming in or out changes the view angle, without 
changing the look-from point. #!N #!I30 #!N o While using orthographic 
projection, zooming in or out adjusts width of the image. The 
camera look-from point does not change, because with orthographic projection the 
look-from parameter merely specifies a direction, not a location in space. 
#!N #!I0 #!N #!EF #!N #!N #!N For more information about 
the projection methods, see  #!Lprojmet,dxall302 h Changing the Projection Method  #!EL  . #!N #!N #!N  #!F-adobe-times-medium-i-normal--18*   Next 
Topic #!EF #!N #!N  #!Lroam,dxall307 h Changing the Look-to Point  #!EL  #!N  #!F-adobe-times-medium-i-normal--18*   #!N 
