"Text" = Talking/Speaking/Reading.

----------- = Time skip.

'Text' = Text message.

(Text) = I, the author, am giving you extra details that you should know in the story.

(Text) = I, the author, am personally telling the reader something like an announcement and such (most likely used in the beginning or end of each part/chapter).

I believe that is all, so now I will go ahead and make the rest of the book, enjoy! (I'm sorry if it's bad)