Robin2, I know how to do it, I have seen the guide, still it's a clumsy way. First attach, then figure out the link, then put it in the tags or use the insert image icon.
On top of that it is even more troublesome for people that are not using a pc or laptop. I use the forum mostly on my tablet. So the insert image icon is not even visible then. I have to tick the "show desktop version" to get it shown. Then when I post it my session is expired, hallways, everyone. So instead of posting I have to copy my message, go back to the mobile version of the webpage and then paste everything.
But, still, even on desktop, it's not much to do but a a hastle. It truly is the reason why a lot of newbies fail to post their pictures in the first place. And usually by the time they get the attachment, the find out it's not posted visible along with the question.
So once again, I know it is not difficult, I know it is only one little extra thing you need to do, it is still annoying;)