Screen to Screen
Clicking on some links brings you to a new screen. The Back, Save and Cancel buttons take you back one screen. Whenever there's information on the current screen that needs to be saved, you'll see the Save and Cancel buttons. Clicking Cancel takes you back without saving the currently open changes, Save saves those changes before taking you back.
Along the top you'll see underlined links, called "breadcrumbs". You can click on any of these links to go back to the corresponding screen in VSys.
Field to Field
On a panel or screen containing fields, press the Tab key to move from one field to the next, or, alternatively, use the mouse to click within a field.