I can do that just fine?
I have no issues reading prior texts when writing a text.How? And this is especially worse if you have selected a larger text.
Look at my attached image. The text takes up the whole screen. I can't dismiss the keyboard in any way. I can't scroll up to see the conversation.
You can scroll up. I just verified this. Pull down the text box from the top. (Pull down from that little border right above the text box.)
That only works when you have a very tiny bit of the message conversation showing like in Italianblend's screenshot. In my screenshot (where the compose box takes up the entire space) I cannot get it to slide down.
I am able to do it even when the compose window takes up the entire space. You have to pull on the space right under the darker blue where the little grey area is above the compose box.