To access the settings app in Android and make changes to any of the many settings:-
Firstly open the Settings app either by clicking the Apps button at bottom of screen and then choosing Settings OR swipe down from the top of the screen and click the settings icon (both methods shown below)

You will then see the following screen which you can navigate around to find the setting you require
All of the settings are divided up into sections:-
Wireless & networks = settings for wireless networks, bluetooth, data usage and aeroplane mode
Device = brightness, notification, sound, storage and battery settings
Personal = location, security, accounts, language and input settings as well as options to backup and reset your device
System = date and time, accessibility, printing, system updates
