A quick guide for neuroglancer:

_spacebar_ on one area: fullscreen the area

L: change colors

X: remove colors

double click one neuron: select the neuron

ctrl-mousewheel: zoom in/out

right-click: center clicked area

A great thing to do is to choose a few neurons (double click on the colored parts in the top-left, top-right, bottom-right windows) and then view the automatic 3d model by using _spacebar_ on the bottom-left window. Press _spacebar_ again to return to the normal view.