How do I post a photo? Search for: Search Knowledge Base How do I post a photo? When you are in a forum thread and you want to post a photo, scroll down to the bottom of the screen where you have typed your reply and you will see “upload attachments”. Click the “choose file” button and then find the file you want to upload on your computer. Once you’ve selected the file, click the upload button. The maximum file size you can upload is 500k. You will get an error if you try to upload a file larger than this. If your file is larger, you will have to reduce the file size in order to upload it.