Scroll to old messages while in edit mode I noticed that when replying to a text message I can access and scroll through previous message from the person I am replying to so I have a good view of the conversation history and can e.g. copy some text from it.

However after typing more than 7 lines of text I can no longer go back to the the message I am replying to.

Is there a way to access conversation history in that scenario, or is it simply a design feature saying "keep it short"?
Tap the Edit button, the keyboard will then hide letting you see the previous text message.

Just be careful to Cancel and not Clear All ;)