Here’s what the Flux documentation says about configuring the layer count:
Flux supports multi-layer designs. In this tutorial, we'll cover:
- Configuring the board stack-up
- Moving objects between layers
- Routing across multiple layers
Configuring Board Stack-up
New projects are configured with a 4-layer stack-up by default. Here's how to configure a different stack-up:
- Go to the "Layout" object in the "Objects" tab on the right-side panel of the PCB editor
- Select the "Layout" object
- In the right panel, add an "Object Specific rule" called "Stackup"
- Select a Stackup from the default list or click on the pencil icon to create a custom stackup with the Stackup Editor