if I'm interpreting that correctly ....
First: might want to edit the pic' for size so it can be seen without scrolling up-down-left-right.
Host your pic' at a photo-sharing site (I like Photobucket but that's just me, there are others). Copy the URL to the photo'.
Put the URL of the pic' between "IMG" tags (left bracket IMG right bracket pic' URL left bracket foreslash URL right bracket). Or, use the "Insert Image" function in the toolbar in the Reply window. Post.
Hope that helps (and I hope it's right!)! Cheers!