I'm coming from iOS so forgive me if I'm asking something obvious. On my old phone when a text message came through the first couple lines of text would sit on the lock screen forever until I answered the text. On my new s8 the first line displays briefly at the top and then goes away and I just get a little envelope icon to let me know I have a text message waiting. Any way to get it to leave that first line of text up long enough for me to read it?