How to change guides in crop&rotate?

I just switched to darktable 3.7 on my new Xubuntu 20.04 machine (from latest 3.5 master for Ubuntu 18.04) and found out that in the new crop&rotate module I cannot change the guides. There is a button hidden in the preset menu to activate and deactivate guides, but I did not found any way to change the guide to golden ratio or the other guides that were in the module before.
How can I change the guidelines?

There’s a button on the far-right of the bottom bar. Right-click to change crop settings. There’s an in-progress pull request to also add these back into the crop module (and a couple of other modules too).

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