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
check family settings
They simply change the sound of your voice when you die.
You cant you have to have a completely different connection
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
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
You cant lower your weapon in multiplayer you can only do it when you change your network settings to local.