Right keys will collapse/expand one
level of items below the selected item. Holding Control and using the
Left/Right keys will completely collapse/expand the selected item and its
children. Holding Shift and using the mousel wheel will change the selected
item. Holding Control and using the mouse wheel will expand/collapse the
selected item.</p>

<p>The <em>properties view</em> displays additional information contained in
the document.</p>

<p>The <em>thumbnails view</em> displays smaller versions of the pa