Different surrounding tools
While you put on the view cube, you will see three more tools appears on your screen in vicinity of that, those are:
Compass: Just below the view cube it appears looks similar to a compass wheel with north, south, east and west demarcations. If you click on say north you will get the view from north and so on. The same thing could be done using view cube as well.
UCS menu: You will see the UCS menu just below the view cube. Initially you will see it is showing WCS. This tool is useful for creation and management of co-ordinate systems. By default it will be set at WCS, however if you wish, can create new UCS and for that you need to click on the small downward triangle just beside it. Select new UCS pick the location, specify point on x co-ordinate and specify point on XY plane, your new unnamed co-ordinate system is ready. For renaming it type ucsman in command line, UCS window will open, there; by right clicking you can give name to the unnamed UCS. Say, you have renamed it to 123. Now click on the small triangle again and select 123 as the new UCS.
Home: This icon is to set and access default view easily. For setting default view create the view by means of rotate, pan, zoom. Now right click on the view cube and select set current view as home. Once you have done this, you can access the home view any time by clicking on the home icon.
View cube helps controlling navigation of different views of a 3D model easily. Managing of UCS is possible using the icon just below view cube. Home icon is used for accessing default view at any point of time. Compass is used to see views from different sides.