Track Expand/Collapse Button Missing

[glarmore]

I have apparently hit some keyboard shortcut by accident. I no longer have the Track Expand/Collapse button on any of my tracks (Sonar Producer). Does anybody know how to get it back.

Thanks,
Glen

 

[YellowDwarf]

Have a look here: https://www.cakewalk.com/Documentation?product=SONAR X3&language=3&help=Menus1.181.html