The Browser normally displays the root directory (/.:)
  when it starts. Double click on the root directory to
  expand or open it. To collapse or close an expanded
  directory, double click on it.

  Directories, object entries, and soft links all have
  icons associated with them. Many object entries have
  unique icons based on their class. You can use the
  Filter menu to display only objects of a particular
  class.

  Customize your display format by choosing options
  listed on the View Menu.

  You can also specify a virtual root, a directory other
  than the root, at which you want to start displaying
  the namespace. You can then immediately focus on a
  particular directory. Use the Customize menu to specify
  a virtual root.

1  –  expand_sel_dirs

  To expand a single directory, double click on it. You
  can expand a particular directory path one level at a
  time by double clicking on single directories.

  To expand selected directories level by level, click
  on the first directory you want to select. Continue
  to select directories by shift clicking on them. When
  selecting the last directory, double click while still
  pressing the Shift key. This selects the last directory
  and expands all the directories you have selected.

2  –  collapse_sel_dirs

  To collapse a single directory, double click on it. You
  can collapse a particular directory path one level at a
  time by double clicking on single directories.

  To collapse selected directories level by level, click
  on the first directory you want to select. Continue
  to select directories by shift clicking on them. When
  selecting the last directory, double click while still
  pressing the Shift key. This selects the last directory
  and collapses all the directories you have selected.