Hierarchical Document Structuring

Every notebook component, such as a heading, a subheading, text, or computer code, is contained in a cell. Each cell has a style that defines all attributes of the cell, including text size, color, and font.

Cells can be grouped, either automatically or manually, into an outline format. The cells can be closed (or collapsed) to show the headings of the outline or opened to show the complete contents of the notebook.

Cells can also be labeled, so that you can index and cross-link their contents and readers can quickly search through the contents of the cells.