Yup, hehe. I know @Ray_Copperblast IRL.
If you click the reply button, an area will come up where you can type something, which you already know. At the top of the area there's the name of the topic, and if you look down a little lower, there's a list of markings, starting with a quote sign. The seventh marking in the list looks like a rectangle with an arrow coming off of it. Tap that, then tap the blank area that says "Upload...." and you can choose something from your photos to upload, if it's not too big.
Sorry if that was really confusing.