From anywhere on your Dashboard you can click on your name in the upper right corner and then click on Profile.
.png?width=688&height=141&name=Change%20profile%20picture%20(1).png)
Click on your profile picture
.png?width=688&height=234&name=Change%20profile%20picture%20(2).png)
Click on the camera icon to upload a picture then click Submit.
.png?width=688&height=344&name=Change%20profile%20picture%20(3).png)
Note: If a picture is not uploaded you will see a generic paper plane as the default profile picture.