Choose the Collapse menu item to remove the display
  children or attributes of an object in a view.

  To collapse the displayed children or attributes:

  1. Use MB1 to select and highlight in the view the
     object you want to collapse

  2. Choose the Collapse menu item

  3. Choose either the Children or Attributes submenu
     item, as appropriate, from the Collapse submenu

  Optionally, double click on a display line (preceded by
  an icon) in the view. This causes the line to expand or
  collapse depending on its current state.