To crop your account profile photo, click on your profile picture and go to the "Settings" menu from your dashboard. Then select the "Profile" link in the "Account Settings" section:
On the "Profile" tab click the "Upload an image" button:
After uploading your picture, you can easily crop it. Make sure to complete the cropping process and click the "Crop" button to save your changes and upload the photo.
Note! The cropping photo option is only available while the photo is uploading.