Text/line wrapping when composing a message

When composing a message, is there any way to change the default text/line number of characters before it wraps to the next line? Currently, when I’m composing a message in either HTML or plain text format (whether new or replying to someone), the number of characters are 163 before automatically wrapping. This is the whole width of the ‘compose’ page on my computer screen. Ideally, I would want the wrapping of text/lines to activate after 80 characters. I realize that the recipient of the message may read it differently depending on the format of their mail programme. It’s just really annoying to type until the end of the page before the text moves onto the next line. Thanks in advance.