Quote Originally Posted by Xhris View Post
Nested layers thus in the P&L gallery to group pages in their sections
Can you clarify what you mean by this Chris? I can understand nested layers, as one thing. But how does that relate to grouping pages into sections?

Impression had Chapter support for long documents, whereby you could swap out non-current chapters for performance and manageability reasons (it's not very useful having one scrolling document 600 pages long or 600 thumbnails in a column). So this was a hierarchical way to manage book length documents.