: The Push/Pull tool (P) is the primary way to turn 2D faces into 3D objects.
Toggle View -> Edge Style -> X-Ray to spot internal faces. sketchup pro 2018
Why? Because SketchUp Pro 2018 represents the last great "hybrid" release; it balanced the raw power of desktop-first modeling with the introduction of modern interoperability. It is stable, feature-rich, and remains the gold standard for users who prefer perpetual license workflows over the modern subscription-only model. : The Push/Pull tool (P) is the primary