Clicking the manual update button now shows an option to include updating of the Rear View Projection in the calculation. You can choose to either update the Active View only or update All Scenes. You can use the update All Scenes in combination with the Rear View Projection to prepare your SketchUp model for LayOut. In this case you still need to save your model in order to propagate changes to Layout.
As an alternative you can use the Export All Scenes to LayOut, this function is similar, except it does not provide the option to skip the Rear View calculation and this methode does save your model.
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