Use
the slider on the Zoom Trackbar to change the magnification factor of the
version tree.
In the Zoom Trackbar, drag the indicator until you see the desired
magnification.
Tip: On the Windows system,
if the visual settings toolbar (which contains the Zoom Trackbar) is not visible,
use the Toolbars command to make it visible. Click Window > Toolbars and select Visual
Settings Toolbar in the window).