Well, I don’t know how to properly explain it but I’ll try…
I clicked something or accidentally pressed a keys combination… so now all paths from all visible layers are editable from an active layer.
In other words, they are not displayed as outlines (no nodes) but as a normal paths - with nodes, handles etc. I can edit all paths from all visible layers from an active layer.
Is there a way to switch this back to how it was - displaying paths from visble but not active layers as outlines (just the way as background is shown), not as actual paths (with nodes etc)?
Here is a screenshot https://dl.dropboxusercontent.com/u/22977838/Screen%20Shot%202017-02-09%20at%2020.46.10.png - two layers (light and bold) are visible.