Can't edit my initial sketch after making a 3d model of it.

[Áquilabp]

Hello everyone.

I am using AutoCAD Mechanical 2017 and lets supose i want to create a 3d model based on a revolve feature, so i create my 2d sketch of it, insert my wanted dimensions for the geometry, use the revolve command and, if i want to edit my initial sketch, i cant access it for some reason, my model tab doesnt show any editable feature how to proceed?

Thanks in advance.