cadence bind key
Generally cds.env file contains information about Bindkeys. If you dont have one your local directory cadence will pick up the default cds.env files from its installation directories. You can copy that file into your local directory from where you start your cadence software. In the copied file in your local directory, you need to modify or add SKILL code. Some study of SKILL code is needed if you want things in your own way. Not very easy but not impossible also.
I tried it that way sometime back and I don't know whether there is any other procedure exists in recent versions.