Many of the program's windows in which you enter information have three
main buttons:

• Save - the
  button saves the changes and closes the window. If you want to save
  the changes without closing the window, select the
  Apply option
  from the drop-down menu.
• Cancel - the
  button discards the changes. If you don't want to close the window,
  select the
  Discard
  option from the drop-down menu.
• Refresh data - the button
  refreshes the data. This button is available in most windows which
  work with data.