Hit the preview button when you wish to make a post. Below the message box it should say "Attach" in bold. Hit the choose file button and select whatever file you wish to attach. There is also blue text for more attachments if you wish to add more. There may be a minimum post requirement to attach posts, I can't remember. You can also use external sites to upload files or images. In the case of using an external image host, like our <a href=http://img.ourl.ca/>Omnimaga image uploader</a> you can use "insert image". It is the icon found two spaces right from the Youtube icon in your post preview screen. Place the url of the image between the [img] tags. Hope this helps! Welcome to Omnimaga by the way! If you have any other questions, don't hesitate to ask!

Thanks, that gave me the push.