Dual extrusion problem with octoprint

[Zhuo_Jin]

I have put 2 extruders and “Shared Nozzle” in Octoprint settings.
Why I can’t choose the second extruder?

[Ewald_Ikemann]

Hello @Zhuo_Jin!

So when you click on Tool 1 it switches back to Tool 0?

[Charlie_Powell]

Tools are zero indexed, 0 is first and 1 is second.