Go to 'me' on your twitter click the gear icon then click on 'edit profile' then swipe down the top of the screen to get the address bar and take out the word 'mobile' from the address; you will then see options for changing pictures!
The Avi on Twitter is your profile picture (Avitar).
if you do not have a picture on twitter that is what comes up as your profile pic.
Its basically your twitter "profile picture"
Clicking on the picture on their profile will open a larger version unless their profile is protected.
You go to edit profile, click browse and choose a picture from your computer .
Go to settings>Profile and change the profile pic.
@justinbieber
Profile pictures on Twitter are usually refered to as 'icons', although there is no official name for them.
You click on upload a picture!
You must link it to Google or Twitter or Facebook and then Answers.com uses your Profile Picture.
You need a picture with a .gif format. And it has to be animated.
It is called an Avi (avatar) or DP (display picture.)