Any autorouting tool available?

[Efcis]

Automatic route procedure

Excuse me for my naive question but I’m a bit lost about automatic auto route. I’m using KiCad for my project and it’s very good cad. I need to develop an analogic circuit and, net by net, I did it very well. Now, for digital nets, I’d like to use the automatic route because the critical analog net are done. But I don’t understand what I have to do to lunch the automatic procedure. Can someone give me a suggestion please ? I’m using the version 5.1.2. Thanks a lot. Claudio