To attach/insert photos into a thread:
1: Click Reply or Quick Reply
2: In Lower Right, Click "Go Advanced"
3: Scroll down until you see "Additional Options"
4: Find Manage Attachments and click on "Manage Attachments"
5: This opens a Manage Attachments window.....find this line "1. Click Add Files to upload new files or select from existing files below" and to the right click on "Add Files"
6: Click on "Browse" and browse and select file. If you want to upload more than one file, click on "+" and browse and select next file. When done selecting files, Click "Upload"
7: Once uploaded, in the Manage Attachments window, under Attachments, you should see the files you want to upload and attach, and Insert Inline (number of images you selected) and then click DONE
8: You can then scroll down a bit and click "Preview Post" to see how your images will look under the "Preview" at the top of the page or you can boldly click "Submit Reply"