# How to have vanishing cell bracket for all notebook

I know that it is possible to make the cell brackets appear only when the mouse is upon them but I do not know how to do that. Of course for one cell it is shown in the documentation but not for an entire notebook.

SetOptions[$FrontEndSession, "ShowCellBracket" -> False]  Fixed setting: SetOptions[$FrontEndSession, "ShowCellBracket" -> False]

SetOptions[nb, "ShowCellBracket" -> False]

• This hides them completely. Should it not be Automatic instead as Kuba comments? – Mr.Wizard Jul 11 '16 at 23:14