Remember when in chat you can "save" the chat.. and while you might not want to save it forever (to the word processing program on your computer) you can click on the 3 1/2" floppy icon on the bottom to save it.. while still in chat that allows you to "READ BACK" in the chat ; to reread anything you might have missed.

Trying to read back from the chat screen won't work since every time someone says something, the screen jumps back to the last comment.