I like to write detailed outlines (to the level of one of James Cameron's famous "Scriptments"). I've found I can do this by entering all my description for each beat into the Synopsis Field of the Beat. Since I'm using the scriptment format, these descriptions can get rather wordy.
A small problem I've run into is that I can't enter a 'Return' into my typed text ('Return' causing a line break), because typing a 'Return' character causes me to exit the Field instead.
A workaround is to type my description text into 'Notepad' the way I want (I'm on Windows), including 'Returns' (line breaks), and then 'copy-paste' the text into the Synopsis Field. This will insert line breaks into the Synopsis Field as originally typed. But after doing this a hundred times it gets to be a bit of a drag.