Using Computer Hardware 4-5
9. Click the Apply button to change the settings.
10. Click Cancel or OK to exit the Display Properties window.

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The higher the refresh frequency, the less video flicker can be seen by the human
eye. If the video image appears to flicker (typically at a refresh rate of 60 Hz), select a
higher supported refresh frequency by following these steps:
1. Double-click the My Computer icon, and then double-click the Control Panel
icon.
2. Double-click the Display icon, and then click the Settings tab (see Figure 4-3).
3. Click the pull-down menu in the Refresh Frequency area.
4. Click the desired refresh frequency.
5. Click the Test button.
6. Read the instructions that appear, and then click OK.
7. If you see a test bitmap pattern, click Yes and proceed to step 9. Otherwise, click
No and go to step 8.
8. Read the message, and click OK. Select a different refresh frequency, and then
repeat steps 3 through 7.
9. Click the Apply button to change the refresh frequency.
10. Click Cancel or OK to exit the Display Properties window.
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The keyboard that came with your Dell computer probabl y looks similar to the one
shown in Figure 4-4.
One of the special keys on your keyboard is the Windows logo key. When pressed, it
displays the Start menu. The Windows logo key may also be pressed simultaneously
with other keys to perform the functions listed in Table 4-1.