Here is a short and simple "how-to" on posting photos on the site using FOTKI as the hosting site.
Login to your FOTKI account and find the image you want to post on the forum. Then click on the "Share" button directly above the image. You'll see the different codes used for sharing.
Simply click on the very first line and you will see the word, "copied" appear in green. That's all that needs to be done on the FOTKI site.
Move to the thread you have started where you want to post the photo. When you place the mouse cursor over the items in the tool bar a "hint" for each item will appear. Find the "Insert Image" tool and click.
Depending on your operating system and browser, you will need to "Paste" the code you have already copied into the top line of the "Insert Image" box. I "Right Click" on the "Image URL" line and I have "Paste" available on the right click menu. You can also usually go to the very top of your computer screen and select, "Edit", then "Paste". And that's all there is to it. Hope this has helped.