Commands, Go to dialog

I just came across a really interesting dialog window, by accident. It was a list of all commands, complete with search capabilities. There was another tab called “Go to”. I’ve googled, searched the forum and pressed random commands, but to no avail. How can I go to this extremely handy feature?

The dialog that gets you to a specific bar? Cmd/Ctrl-G is certainly the default English shortcut.

It’s the jump bar. Hit J.

Thanks! This is brilliant!