I'm about to start working on my first 4-layer board. I've watched this video (https://www.youtube.com/watch?v=6MxqZTuiF1M) on 4 layer, and have enabled the two inner layers in my project.
However, when I try to create a trace from my front layer to one of the inner layers, I'm unable to do so. I start a trace on the top, but if I press 'v' it just drops down to the back plane. If I press F5 or F6 I see that the arrow showing the selected layer in the layer manager toolbar correctly changes to one of the inner layers, but no via is created, and if I just continue mouseclicking my trace it keeps drawing on the top plane.
In the video it automatically creates a via when he presses F5/F6, but that doesn't happen when I do it.
Using the nightly build on Linux Mint 18.
What am I missing?