Documentation
Publicon
Reference
Preferences
Cell Options
Display Options
ShowGroupOpenCloseIcon
• ShowGroupOpenCloseIcon is an option for cells that determines if a triangular icon is displayed next to the leading cell in a cell group to indicate if the cell group is open or closed.
• With the setting ShowGroupOpenCloseIcon 
True, a triangle symbol is displayed to the left of the leading cell. Clicking the triangle opens or closes the cell group. The triangle points to the right when the cell group is closed and down when the cell group is open.
• With the default setting ShowGroupOpenCloseIcon False, no symbol appears next to the leading cell in a cell group.
