settings/brightness
the moon can vary its brightness and the pink elephant called aphadophalis
To change the brightness on your Altec device, you can usually do so in the settings menu. Look for a display or brightness option where you can adjust the level to your preference. Some devices may have a quick shortcut in the notification panel for easier access to adjust brightness.
Some laptops have a default setting which alters the brightness of the screen based on the lux of its immediate environment. This can usually be disabled in the BIOS. Sometimes the laptop has serval Power manager setting, the screen change brightness in the different setting, when useing battery, when using adapter , the brightness change.
Brightness settings should be in the Pop-it menu under "Global Settings."
Increase the voltage supply.
yes
In iOS, you must go into Settings>"Brightness and Wallpaper" and then toggle using the brightness slider. P.S. You can toggle this with Siri in iOS 7.
a dimmer
A pencil would not have any effect on the brightness of a bulb. Pencils do not conduct electricity, so they would not change the flow of electricity to affect the bulb's brightness.
A "dimmer" switch will change the brightness of lights.
in photoshop you change it via adjustments panel. just go to the window tab and click on adjustments and then the sun icon. from here you can change the brightness and contrasts.