The script properties are some headers and other options that affect the entire script in various ways. They can be accessed from the File menu -> Properties.
The properties are:
Wrap style - Controls how the subtitle renderer will break lines that are too long to fit on one line. The modes are:
The wrapping mode should almost always be zero. Mode two is sometimes useful for long lines which are scrolled or manually line-broken, but should be set on a per-line basis with the \q tag.