If you have multiple pages in a layout file all linking to one model in sketchup (various scenes), is it possible to relink all the pages at once to a new sketchup model? Or must I enter each page and link each one?
Yes. It’s possible. Go into File>Document Setup>References. Select the .skp file, click Relink, choose the new file.
I have several LO templates that include a proxy .skp file with viewports setup on multiple pages. When I start a new project I open the template and immediately relink to the project’s SketchUp model. Important to note that the scenes in the first and second SketchUp files must have the exact same names for relinking to work correctly.