how do you delete or edit the thumbnail picture for your link in facebook?

[Z]

I would like to edit the thumbnail picture that appear every time I typed my website address on the facebook. Can you change the picture in the thumbnail and the description without doing any coding or debugging?
Thanks for the answers. Actually, when I said edit I meant change/delete the picture because when I typed my website link the default thumbnail and description from my previous post will appear. I uploaded the picture from my computer not from the photo album or external link.

[Lucas]

if your talking about your profile picture, you just click your profile picture, then hold cursor over the picture again and click "edit profile picture"

[Daniel]

You Can Change the Description But if you Want a New Picture your Gonna Have to Upload it Or Go to the Album that its in If its Already on Facebook and Go to Options Than Click Choose as Profile Picture

you Can Not Edit How a Image Looks On your Facebook There is No Photo Editor