Scrolling Text And Hard Return In Text Box

I would greatly appreciate if anyone, could tell me how to scroll text in a text box and how to create a carriage return.

After trying repeatedly I have only managed to successfully type over the existing text!

Many, many thanks!

Hey there, I have found a YouTube video which explains you how you can create a text box with a scrollable text. You can explore more about text properties here. Could you show me a screen recording where you’re writing over existing text?