Multi-layered underground - visibility

[Postlimit]

Hello!

When you build two or more levels of underground, only the top level is visible, making changes to the bottom level very tricky.
I'm guessing that there is a key combination to toggle between levels of underground, like the ctrl-U does for above ground? The help suggests this is [HOME] and [END], (increase and decrease underground level) but pressing those buttons doesn't seem to do much? What's the trick, what obvious thing did I miss until now?

Picture:


Thanks in advance!

p.s. I know that you can rotate the view - that solves some problems, but not all.

[omikron]

You need to change to 'sliced underground view' with the Ctrl+U and then toggle the layers with 'Home' and 'End'

Ctrl+U will show you one level only, whether it is above or below ground. Above ground, the lower levels are also visible, underground not.

omikron

[Postlimit]

Ah, lol

I knew there was something I did wrong. It's so simple that now I'm a bit embarrassed with the question.

Thanks for the quick answer!