If rendering of the graph fails (i.e., you only see the dot source file) or you need the output in a different format, the dot source can also be rendered using the free desktop program Graphviz, or rendered online at GraphvizFiddle or WebGraphviz.
Notes: When color is on, nodes that are linked but do not exist are colored white. When color by length is on, all other nodes are colored in shades of red (shorter than average) to blue (longer than average) based on the relative length of their contents. The start node is double-circled. The cluster and color by tag options use the first tag on each passage; the omit by tag(s) option checks all tags. Optional detection of an "End" tag changes the shape of "End" passages to an egg (and puts diagonals on loose ends and disconnected nodes). Optional detection of a "checkpoint" tag changes the shape of checkpoint passages to a diamond. Stray or misplaced nodes can result from the omit tags setting, or from duplicate passage names or other linking issues. The image format is SVG.