Default View:
SketchUp's modeling environment is 3D all the time. Please choose your default view into that 3D environment.

 
Perspective View Top View

Default Units:
SketchUp works in real world dimensions. Please choose the default units you want used to display those dimensions
.

Units:    

* Default settings such as units and starting view are saved in a template file. You can easily change your default settings at anytime. See SketchUp Help for more information on templates.