1. Descriptions can be written in Markdown with LaTeX mathematical expressions between $ $ or $$ $$. Add a description to any chapter by clicking the second button from the left in the chapter's frame. After you double-click the description it enters edit mode. Press Tab or click anywhere outside the editor to return to display mode. To remove a chapter description, delete all its content.
2. Explorer of boxed nouns inspired by Bob Therriault's Jig addon. Clicking a boxed noun in the left panel opens explorer. Click any nested item in the explorer to copy its boxing path which can be pasted directly into code as the left argument of the {:: to select it. A grey fill indicates an empty array. Hovering highlights the current target. Press and hold to display a tooltip with its type, shape, boxing level and path.