It would make LayOut much more efficient if one could view and edit multiple LO pages at once. This would save time when needing to move viewports on a number of pages when you would like to keep them aligned from page to page. Thanks for your consideration!
Good idea! I’ve asked for the same to happen in SU so that scenes and layers could be all controlled from one integrated panel. Even if we got to something like that, it would make SU/LO much more versatile. Integrated Scene and Layer Manager
Perhaps something like that could also be adapted to solve for what you are asking?