John Fultz posted an answer which had an undocumented option.

CellPrint[{
  Cell["Click to open the section", "Section", 
       System`WholeCellGroupOpener -> True],
  TextCell["Some text"]}]

This produces a section cell that if you click anywhere on it will open and close the whole section.

John Fultz posted an answer which had an undocumented option.

CellPrint[{
  Cell["Click to open the section", "Section", 
       System`WholeCellGroupOpener -> True],
  TextCell["Some text"]}]

This produces a section cell that if you click anywhere on it will open and close the whole section.

John Fultz posted an answer which had an undocumented option

CellPrint[{
  Cell["Click to open the section", "Section", 
       System`WholeCellGroupOpener -> True],
  TextCell["Some text"]}]

This produces a section cell that if you click anywhere on it will open and close the whole section.

John Fultz posted an answer which had an undocumented option.

CellPrint[{
  Cell["Click to open the section", "Section", 
       System`WholeCellGroupOpener -> True],
  TextCell["Some text"]}]

This produces a section cell that if you click anywhere on it will open and close the whole section.

Undocumented Cell options

Please add any more undocumented Cell options that you know to this answer.

WholeCellGroupOpener

John Fultz posted an answer which had an undocumented option

CellPrint[{
  Cell["Click to open the section", "Section", 
       System`WholeCellGroupOpener -> True],
  TextCell["Some text"]}]

This produces a section cell that if you click anywhere on it will open and close the whole section.

John Fultz posted an answer which had an undocumented option

CellPrint[{
  Cell["Click to open the section", "Section", 
       System`WholeCellGroupOpener -> True],
  TextCell["Some text"]}]

This produces a section cell that if you click anywhere on it will open and close the whole section.