Is it possible to upload a picture into an address that already exists? I know that doesn't make much sense so let me explain what I want to do.
I am assuming that when I upload a picture, the software somewhere automatically assigns it a spot on the main server and it has it's own unique address. I use this address when posting say a diagram, and as long as I leave it there, all my old posts will always pick up that diagram. Say sometime down the road I want to update the diagram to make it more clear or look better. If I delete it, then upload the new one, all the old posts with the old diagram will get the dreaded "red x" box. If I could update or load in the new picture and use the same address, then all the old posts will have the updated diagram too.
Is there way to do this? I thought maybe I could pull the old picture up, copy the url in the address bar, and then direct the software to put it back in that spot.