I click "manage attachments" (below the text box), and then "browse. That will take you to your computer files where you pick the photo and click "select" or "open". The browser window will come back ,then just hit "upload".
If you are entering a reply to a thread, you have to click "go advanced" first,BTW. This will open the window with the full posting abilities.
The photos have to be below 100KB.
I have a nice fast and simple way I do it (using a resize program works well,too). When I am downloading photos from the camera to the computer, I always process them to crop/adjust color/etc. On a photo that I think I will want to post on the BF , after cropping and such I hit "email photo", the email window opens with "size photo" and the choices (medium works just right) .I select "file">"save attachments">"save" and close the email. The proper size saved photo is now in my documents file and the original full size photo is in my pictures file. This whole process about 5 seconds.
Stacy