This was discussed in an earlier thread. We thought it might be useful to summarise the process. I hope the instructions are clearer than those supplied with flat-pack furniture. You definitely don't need an Allen key.
In order to include a photo in your forum post, you need to upload the image to what is apparently known in the trade as ‘a hosted solution’. Could that be some kind of heated trolley? By the way, 'uploading' just means that you copy a photo from your computer onto a website so that other people can see it.
Examples of these...