SketchUp components enable you to reuse objects. For example, pretty much every building has at least one door and window. Instead of modeling these common objects, you can insert a component that someone else has already made. Like all geometry in SketchUp, a component is still made of edges and faces. The edges and faces are simply part of a special component group. (You can also create components to reuse your own geometry, but that’s covered in Developing Components and Dynamic Components.)
What distinguishes solid construction and design from an M.C. Escher optical illusion? Accurate measurements. In SketchUp, the Tape Measure tool, the Protractor tool, and the Measurements box enable you to model precisely:
With SketchUp's flipping and rotating tools, your geometry becomes as nimble as an acrobatic troupe. The Flip Along command enables geometry to backflip 180 degrees along any axis. With the Rotate tool, your geometry can spin and fold like a professional gymnast.
In SketchUp, you can copy geometry by using The Copy and Paste commands The Move tool () The Rotate tool () When you copy and paste with the Move tool, you can make a single copy or create multiple copies and tell SketchUp how to space them — if you know the secret keystrokes.