go to your profile. click on your pictures. then pic which one आप want, या click on the अपलोड button to अपलोड a new one & then आप can संपादन करे the pic द्वारा clicking the संपादन करे button. if the pic is there that आप want then click the little person below it to make ur आइकन pic. hope ya understand that!
Well what I do is go on my प्रोफ़ाइल and click on और photos, choose which one I want for my आइकन and make it my आइकन द्वारा clicking on "Make this image my icon." (Says it under all the तस्वीरें आप uploaded. Or, I अपलोड the image I do want for my आइकन into my प्रोफ़ाइल and when I'm editing it, I check off the box that says "Make this image your icon." Hope I helped :)