Settings, Player profiles, Your profile, then go down you will see it
In your multiplayer settings.
Bungie made it its a default setting if you want to change it go to settings and select controls
you firstly make an person or go into person settings and change your person to alien o0r human
They simply change the sound of your voice when you die.
You cant you have to have a completely different connection
check family settings
This means your parental settings limit you from the use of player created content (maps, games, etc. created by other Halo players). This can be changed a the parental settings on the dashboard.
start halo/go to settings/video settings/decals/off
To change your look sensitivity in Halo: Reach, go to the main menu and select "Options." From there, choose "Settings," then navigate to "Controller" settings. Here, you'll find the "Look Sensitivity" option, which you can adjust to your preference using the slider. After making your adjustments, remember to save your settings before exiting the menu.
If You Mean change into elite, no, you can only do that in Halo 2, 3 and Halo Reach. But however you can use mods at halomods.com
you go to settings and go to apperance and pick your profile and then go from there