How do you attach an image to a post here on mylot?

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Hi, how do do you attach an image to a post here on mylot, i have tried the as an image feature below but it has a box to enter the image's description, the image's title and everything, but i really don't believe that its there i should go to attach an image to my post, do i need to add like a html code or something if so please explain how above if possible write the code. Thanks