First read this, there are very important advices for a beginner!
- Be sure that all raw geometry - edges and faces - are always associated with “Layer 0”.
- Keep “Layer 0” the active layer at all times (which goes a long way to ensuring point 1).
- When you have identified a set of geometry that represents some more-or-less independent “thing,” create a Group or Component to hold the thing’s raw geometry. This could be a wall, or a set of adjacent walls. Groups and components can be nested, so you can have a North Wall object, a South Wall object, etc. and then collect the various walls into a First Floor object.
- If you want to control visibility of objects via SketchUp’s layer feature, associate those groups or components with various layers. Do NOT associate any of their actual edges and faces with a custom layer; only associate the overall group or component with the custom layer.
When you select a group, right-click on it and choose Edit Group, not Explode.
