In the Version Tree Browser, you can use the
button at the bottom of a version marker or a branch marker to collapse or
expand the display of the versions and branches lower in the hierarchy.
Expand and collapse button on a version marker
Expand and collapse button on a branch marker
Find the button on the version or branch marker that has a plus
(+) character. A particular marker that has a plus character has
versions or subbranches that are collapsed.