How to upload a photo

I am trying to figure out how to upload a photo from my phone so that I can be able to put it into my thread/question I would like to start. I am using XDA Premium 4. My phone is a Galaxy S5 (G900A). I also tried to figure it out using the xda website, but I am not seeing a "browse button" or anywhere on the screen that says "manage attatchments". Can you point me in the right direction?
Thanks,
Jennifer