[header] How to change avatar on yahoo [title] Launch yahoo messenger. [step] You can launch it from your start menu by clicking its icon there, or by double-clicking its shortcut icon on the desktop, if you have it there. [title] Sign into yahoo. 
[step] Enter your yahoo id and password on the fields provided then click " sign in " to access your account. [substeps] Once the program loads, at the top, just below the header menu, is your name and avatar or profile picture.