Where is the measurement box in SketchUp?
It is normally in the lower right corner of the screen. If it is not there, make sure you have SketchUp set to full screen. Go to View >Toolbars and uptick Measurements.
How do I change Sketchup to metric?
In SketchUp Desktop: You can change units in SketchUp (desktop) by going to Window > Model Info > Units. This will automatically change all of the dimensions in the model to match.
How do you explode in Sketchup?
To break up the object, click to select it and choose Edit > Group > Explode or Edit > Component > Explode.