Cell Groups and Outlining
Mathematica normally organizes the cells in a notebook automatically into hierarchical groups. Double-clicking lets you show only the heading cell of a group, or only a particular cell within a group—such as a graphic or the result of a computation.
double-click a group bracket
— open or close a cell group
double-click cell brackets
— close all other cells in a group
Ctrl+' — open or close selected cells
Ctrl+{ — open all subgroups
Ctrl+} — close all subgroups
Ctrl+Shift+D — divide a cell in two
Ctrl+Shift+M — merge cells
Ctrl+G () — group selected cells together
Ctrl+U () — ungroup selected cells
— switch off automatic cell grouping
