Choose the Expand menu item to display in a view
  the children or attributes of objects preceded by
  icons. Children and attributes represent additional
  information or levels of detail about an object.

  To expand a view object preceded by an icon, perform
  the following steps:

  1. Use MB1 to select and highlight the specific object
     in the view

  2. Choose the Expand menu item

  3. Choose either the Children or Attributes submenu
     item

  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.

1  –  v_xcd

  Choose the Children submenu item to display the
  children of a selected object you are viewing.

  Children, denoted in a view by an icon, are descended
  directly from the object.

  For example, tests are children of a collection.
  Similarly, subgroups are children of a group and tests
  are children of subgroups.

2  –  v_xat

  Choose the Attributes submenu item to display the
  attributes of a selected object you are viewing.

  Attributes lack an icon when displayed in a view; they
  characterize an object. For example, variables and
  filters are attributes of a test description.