To add pictures to a post or a thread:
Step 1: Get your photo on the computer, but we can assume you have done that already.
Step 2: You will need to go to a photo hosting website such as
www.photobucket.com and then you need to upload your photo to photobucket (example, you could use flickr if you wish). You will also need to make a photobucket account which is free to make.
Step 3: After you have uploaded your photo onto a photo hosting website, you right click on the image, and then select "Copy Image URL" or "Copy Image Location" (depends on web browser). After that you go back to your thread or post and click the "Insert Image" button when you are writing a message. Paste the URL into the pop-up that appears and your photo is embedded into your post.
I wish that the information shown here is useful 👍 .
EDIT: If you want to centre your image in your post, then you can put extra centre tags like this:
{CENTER}
{/CENTER}
So it will look like this: