Change opener controls to cell groups to make them easier to open and close.

Globally using the Preferences dialog...

By default, ShowGroupOpener is set to Inline:

Choose [Mathematica] Preferences... () to open the Preferences dialog, then change ShowGroupOpener to InsideFrame:

Now, ShowGroupOpener is set to InsideFrame:

  • For Windows and Linux users, the Preferences dialog is located in Edit Preferences...

Programmatically for All Cells in a Notebook...

Use SetOptions to change group openers for all group header cells in a particular notebook:


A cells group opener will not show if the group has no contents.