Nikon LS-3500 - LS-3510 - Manual (Page 40)

5-8 Using The Macintosh Scanner Plugin
Software Reference for Scanners
First, you should select the crop with the mouse:
Fig. 33 Mouse Selected Crop
The resolution specification items may now look like this for the above crop:
Fig. 34 Specifications for Mouse Selected Crop
Now, check the Proportions checkbox. This will allow you to enter a height
or width value without changing the aspect ratio. Type 8 into the width edit field.
The resolution specification items will look like this:
Fig. 35 Lock Proportions
Note the little lock in the previous figure. That means that any changes in
width will cause a change in height to keep the scan rectangle in the same aspect
ratio as before. That is what locked proportions means. The value in the height
edit field changed to 6.4.