When you find a forum topic you want to add a photo to, the first thing you'll see is the comments / photos posted by other members, as well as the person's comment who started the thread. In the Photo Month forum, for example, this would usually be myself, nik111, introducing the day's topic which will then be followed by photos posted by various members.
The page will look something like this:
Find The Comment Box
Next, if you're adding a comment rather than creating a new topic, scroll to the bottom of the page where you'll find the 'Add a Comment' box.
This is what it looks like:
If Creating A New Topic
If you're creating a new topic you won't need to scroll to the bottom of the page as the comment box will already be at the top of the page like this:
Adding A Photo
To add a photo, click the sixth icon from the left, it looks like a small polaroid with a + icon over it.
Here's the icon:
Click the icon and a box will open which says 'Upload An Image'. To upload an image, click the Browse icon, find your image and hit the 'open' button.
Note: You'll also notice a Select tab and this is where you can see photos that you've previously uploaded to that specific forum so it will be empty until you've posted your first shot.
Next, press the 'Upload image' button and wait for the image to be uploaded.
In The Add A Comment Box
You won't be able to see the image yet, however you will see that the image's name has appeared in the 'Add a Comment' box with [epzimg] [/epzimg] around it. You can add text above and below this to change where the image appears in the post.
If you want to preview the photo before you post it, click 'Preview' otherwise you can click 'Add' and your image will now be posted in the forum.