Polina Pine's Phd research project, cosupervised by Yuval Yaish involves
vibrating nanotubes. In order to debug code we need to see under
which circumstances the nanotube returns to its original position.
When the movements are large, varying the bond length enables us to
see how it streched and returned. When they are small the length of each bond changes within the resolution of AViz.
One way to show clearly if it returns is to take the ``slice option'' but use the
indicate only option to draw a plane thru the tube and observe how far it rises.