[Accelo]

It's not obvious how to post pictures.
Unless you are the originator of the posting you will have to hit reply and then go to the advanced button (Next to the quick reply button at the bottom of the dialog box). to find the button to add pictures.

One might guess it's the square box with the mountains in it. That may be a hold over from the old days when people used picture hosting sites. I use the paper clip and pick from the pictures on my PC. Typically downloaded from my phone and then uploaded to my PC from the cloud for posting.

My phone is just too small, for my eyes, to do it directly from it.
Cheers.