As C3 continues to add new functions, some content is no longer suitable for certain categories and should be classified separately.
For example 'effect', I think effect should group them separately. Or more detail
Layers
layers: General (Set angle, opacity, visible, transparent, scale...)
layers: Scroll (Set scroll, parallax...)
layers: Effect (Set effect, blend mode...)
Layout
layout: General
layout: Jump (Go to layout...)
layout: initialization (Restart, Recreate...)
layout: Effect
layout: Perspective (Set projection, vanishing point...)