Navigator: How to Jump to Shape

Hi, I´m using Libre Impress (Version: I would like to jump to a certain shape by a double-klick on a certain “Shape N” in the navigator. However, this seems to be only possible when having named the shape explicitly or is there another way to do this?
Is it possible to make certain shapes invisible?

That double-click feature of the navigator is indeed only implemented for named objects.

As far as I know “invisible” is not a property of shapes in Impress/Draw. In Draw you can put the shape on a separate layer and set the layer invisible. That is not possible in Impress. You can set the area and the line both to 100% transparent. The shape is then no longer reachable with the mouse, but you can get it by traverse with the tab key or by navigator, if you have named it.