HTC HD mini User Manual page 265

To set notification sounds
You can personalize your phone with unique notification sounds for
different events such as missed calls, new text messages, new email,
reminders, and more. On the Home screen, slide to the Settings tab
and then tap Sound & Display > Notification sounds to choose a
different sound for each type of event.
On the Notification Sound screen, tap the left side of the screen
that shows the types of events to choose the sound to use for each
event. Tapping the Off/On switches on the right turns on or off the
notification sounds.
To adjust screen brightness
By default, your phone automatically adjusts the screen brightness
according to the ambient lighting. Turn off auto brightness if you want
to be able to adjust the screen brightness.
1. On the Home screen, slide to the Settings tab and then tap
Sound & Display.
. Scroll down to the Display setting and then tap Backlight.
. Clear the Automatically adjust backlight check box.
. Adjust the brightness by dragging the slider under On battery
power and On external power.
. Tap Done.
To change backlight and automatic Sleep mode settings
Dimming the backlight and switching the phone to Sleep mode help
save battery power. You can change the idle time before the backlight
automatically dims. You can also change the idle time before the
phone goes into Sleep mode.
1. On the Home screen, slide to the Settings tab and then tap
Sound & Display.
. Scroll down to the Display setting and then tap Backlight.
Chapter 1 Managing Your Phone