ATI Technologies HD3800 Series - Change Desktop Size; Change Color Quality; Change Display Refresh Rate

Chapter 3: Software Installation
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3.6.5 Change desktop size
1. Click Displays Manager in Advanced View.
2. Select a size from the Desktop Area drop-down menu.
3.6.6 Change Color quality
1. Click Displays Manager in Advanced View.
2. Select the desired color setting from the Color Quality drop-down
menu.
3.6.7 Change display refresh rate
1. Click Displays Manager in Advanced View.
2. Choose a refresh rate from the Refresh Rate drop-down menu.
Note: See your monitor manual for supported refresh rates. Setting a
refresh rate higher than recommended by the monitor manufacturer
could damage the monitor.