Excuse me, is there any way to do mannual routing of a specific net?

I think you would need to do it in Magic or KLayout

@yifei zhu In what flow ? ORFS or OpenLane ? You can definitely use custom scripts using OpenDB API to route some nets before the GRT/DRT, the question is how/where to inject those at the right moment in the flow. With Openlane2 it's pretty easy. Not sure about the other flows.

@tnt How would you do that in OL2?