If you already have the image or pattern in a format Pegasus likes, start a new message, on the bar just above the message, click the icon second from the right (mountain with sun), add wallpaper.
Should do as you request.
<p>If you already have the image or pattern in a format Pegasus likes, start a new message, on the bar just above the message, click the icon second from the right (mountain with sun), add wallpaper.</p><p>Should do as you request.</p>