Hi i make mostly coils and i wonderd how i could use vias from the front copper layer to the back. before i made normal pcb's with compenents and uses NET to connect it to the apropiate layer
but how can you do this without schematic? i just want a VIA from Toplayer to Bottom layer. i am not sure if just placing a via on the top layer will work... before i order anything.
Kind regards Joppe
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
Vias connect to copper with the same net name on all layers.
You do not place a via "on a layer": you just place it.
It may help you to study:
https://oshwlab.com/andyfierman/Elements_of_a_simple_PCB-e42c7b2a4e17449f821a97d04806aeeb