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For the Knife Tool, it used to be holding the Ctrl key and dragging across a node connection to cancel the node connections, while to create a reroute node, it was holding Shift and dragging across a node connection.
What are the new keyboard shortcut for Knife Tool and Reroute Node for the Node Wrangler for Blender 2.8?
As far as I can tell nothing has changed, the node wrangler works just fine.
Make sure the addon is enabled in the system preferences, it is not enabled by default. If you use it constantly make sure you save the preferences to make enable the addon permanently.
Then cut while pressing ⎈ Ctrl.
To reroute use ⇧ Shift and move the mouse across the connection.
To do lazy connect use ⎈ Ctrl +⇧ Shift
As of yet, there are no shortcuts for this anymore. The current workflow is to open the Tool-Panel with T and then selecting the Cut Links Tool (the one with the scissors), holding Shift while dragging it over a noodle will add a Reroute.
I have mapped the Shortcut manually, and now it works again. Even in Box and Lasso Select Modes. The drawback of this is, that deselecting, which had the Ctrl-Key before is blocked by this.
