User Guide

6.1 Working with Documents
6-9
Working with Documents Chapter 6
6.1.3.6 Brightness and Contrast
These operations adjust the brightness and contrast of an image. The user indicates the desired
level of brightness/contrast, either by entering a number or making use of an on-screen slider
control. The image is adjusted on the screen.
To adjust the image brightness
1. Select the image that you want to modify.
2. Click the button to enable the image editor functions. The buttons will
become visible on the user interface.
3. Click the button. The following dialog is displayed.
4. The dialog contains several controls:
•
Thumbnails
section This section displays 2 thumbnail images showing the
Original (Before) and Modified (After) versions of the
image. These allow you to see the effect of the bright-
ness change before it is accepted.
•
Percentage
section This section is used to specify the new brightness
value. You may enter the value in the field provided, or
use the slider control to specify the value. The accept-
able range is -100 to +100 with 0 being the center value
of the image being displayed.
5. Click
OK
to proceed and change the image or
Cancel
to stop the operation.