Sidebar disappeared

My sidebar on the right showing layers, material, properties etc. has suddenly disappeared.

I have been looking in options without result.

I restarted Rhino, and now I do not have a sidebar missing even when I open older projects.

Please help

Assigned to Rhino category

Window pull-down menu > Window Layouts > Default Window Layout

Any luck?

I know this problem. If you show Layers panel or Properties Panel does it jump to the top bar as a toolbar?

Yes, clicking Panel —> Properties worked, it popped right up.
That is so unintuitive.

Thanks!