Multi-layer PCB and power layer

Layout
1

Not sure if it is a dumb question, but I didn’t find an answer in the docs or in other threads. Perhaps I used a wrong search query.

I set up my PCB as 4-layer with the inner ones as power layers:

image

To actually use them as power planes I still need to add a “filled zone” as usual?
Or is there a way to assign to each power layer a net (like GND or +5V) in the PCB configuration?

2

Yes, you need to explicitly fill them.
The name of the layer is just for your reference - you can still add traces on a power layer, for example.

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