Technology Tree - view from top level

[satisfactorio]

Hi there,

Is there a simple way (that i'm probably overlooking) to reset the view of the tech tree?
In other words, a shortcut key or key/mouse combo to view the tech tree from the top level.

Fantastic game by the way!

[jodokus31]

Hmm, what works in any case is reopen Tech-Screen: Double "T".