Some useful tips on sketchup axis
In this exclusive sketchup video tutorial, Justin Geis briefly explains the significance of modeling along the axes in sketchup. The sketchup axes can be used to settle your inferencing, align the scale tool, generate location based models and lots other.
Drawing axes are vital to understanding how Google SketchUp functions. The drawing axes in sketchUp are used to determine where you are (and where you want to go) in 3D space.
Axes help in creating modeling in SketchUp rapid, perfect, and comparatively intuitive.
In sketchup the global axis lines belong to the red, green and blue lines which are usually demonstrated in the drawing window. The point where these lines are intersected is known as the origin. The red line stands for the X-axis, green for the Y-axis and blue for the Z-axis. The Z-axis is the vertical one. Components obtain their own axes. The solid axis lines remain to the positive direction whereas the dotted axis lines remain on the negative side.
To get more clear ideas, go through the following tutorial.
Video Source TheSketchUpEssentials