Help Needed With Message Board Width

[Nort]

For some reason, when I go to read a Message Board, the entire message text box does not display. Instead, I get a slider at the bottom of the screen. If I want to read the right side of the message box, I need to slide the slider to shift the text box. This is a hassle, and not something that has happened in the past.

Can someone tell me the quick fix?

Thanks in advance.