Summary: Every reviewer is able to decide how multi-page proofs are displayed inside Legacy Proof Viewer.
Where is the feature setup? The new version of the viewer has expanded the capability of all layout types. Right now your reviewers can display multi-page proofs using 3 different types of layouts:
Single page view
Switching between pages on a single page view is done by clicking the arrows to go to the next page or previous page.
Continuous page view
In continuous page view, you can simply scroll through the pages. This layout displays pages one after the other with a small gap between each page.
Magazine Layout lets you view the proof as it would appear in real life. The first page is centered, and the following pages are displayed one next to another. It is useful when reviewing proofs for magazines, brochures, and books.
If a user utilizes the navigation buttons or enters the page number, the Legacy Proof Viewer simulates scrolling up/down to that page.
In compare mode, scrolling between pages is synchronized when using continuous page layout.