Dell Precision M90 - Manual (Page 45)

You can also adjust the volume with the Volume Control option through the Start menu.
1. Click Start® All Programs® Accessories® Entertainment® Volume Control.
2. Click and drag the bar in the Volume Control column and slide it up or down to increase or decrease the volume.
For more information on volume control options, click Help in the Volume Control window.
The Volume Meter displays the current volume level, including mute, on your computer. Either click the icon in the taskbar and select or deselect Disable
On Screen Volume Meter, or press the volume control buttons to enable or disable the Volume Meter on the screen.
When the meter is enabled, adjust the volume with the volume control buttons or by pressing the following keys:
l Press <Fn> <PageUp> to increase volume.
l Press <Fn> <PageDn> to decrease volume.
l Press <Fn> <End> to mute volume.
For more information about QuickSet, right-click the icon in the taskbar and click Help.
Adjusting the Picture
If an error message notifies you that the current resolution and color depth are using too much memory and preventing DVD playback, adjust the display
properties.
1. Click Start® Control Panel® Appearance and Themes® Change the screen resolution.
2. Click and drag the bar in Screen resolution to change the setting to 1024 by 768 pixels.
3. Click the drop-down menu under Color quality, and then click Medium (16 bit)® OK.
Mute the sound.
Turn the volume down.
Turn the volume up.
Play or pause.
Play the previous track.
Play the next track.
Stop.
1 volume icon 2 Volume Meter 3 mute icon