-The general documentation approach is to create a separate chapter for each processing option in a sequence which follows the layout of BNC's Graphical User Interface (GUI). The advantage is that searching for help by means of the document's Table of Contents (TOC) is quite convenient. A comprehensive number of TOC entries is the accepted downside of this approach. +The general documentation approach is to create a separate chapter for each processing option in a sequence which follows the layout of BNC's Graphical User Interface (GUI). The advantage is that searching for help by means of the document's Table of Contents (TOC) is quite convenient. A rather comprehensive number of TOC entries is the accepted downside of this approach.