The function: "Enable/Disable Preview Panel" is not working for me.

[Matthias515566]

What can I do to fix this?

[Mathias (Author)]

Bit hard to say with just that information.

Nothing at all happens.. that strange..

[Matthias515566]

Since I activated the 'File Commands' toolbar, it works. When the toolbar was deactivated, neither a newly created button nor the keyboard shortcut Shift+Alt+Q worked.