This comes up a lot, so here’s some tips:
If your viewports aren’t updating in Layout, it’s likely from one of these reasons:
If you change the SketchUp Model panel settings in Layout, they will override the Scene settings, and those properties will persist to any copied viewports in Layout, even if you change the scene. To regain the SketchUp Scene properties for a selected viewport, open the SketchUp Model panel in Layout (use the Window menu if you don’t see it) and click the “Reset” buttons next to the relevant property categories, such as Camera, especially. If you don’t see “Reset” buttons, then that’s not the issue.
Try right-clicking on a viewport and hit “Render Model.” If the Viewport isn’t set to Auto-Render in the SketchUp Model panel in Layout (it just says “Auto” with a checkbox next ot it), then changes won’t show until you re-render the viewport.
Make sure you’re “updating” Scenes in SketchUp after making changes (right-click on the scene tab and hit Update), and then saving the SketchUp model file, and then updating the model reference in Layout.
If there are special characters in your folder or file names along the filepath of the reference, then the model link will break and LayOut will only reference the internal clone model. Once you remove those special characters, then you should be able to go to File > Document Setup > References and Relink the model to your model’s file location.
Anything that you do to the viewport that changes the viewport so it doesn’t match the scene properties.
Examples, changing style, visibile tags, double clicking into the viewport to move the camera, manually ticking the Ortho check box, manually selecting a standard view.
Best practice is to at least avoid a reset button in the Camera section as this one creates the most problems for users.
Reset All will show in the top section of the SketchUp Model panel and Reset will show up in the section where you’ve made changes to the properties. The dark background for the section will also indicates it’s been modified. Here I have modified the Tags section.
The Ortho box and Standard Views fields are automatically filled because the scene is set that way in the SketchUp model so there’s no changes to the Camera properties here.
Several versions ago they made it so you have to intentionally enable opening the viewport for editing. By default it is disabled. Folks could make it so much easier for themselves if they’d leave that box unticked and keep the cursor away from the Ortho tick box and the Standard Views drop down.