In general settings, you can set the web part height and enable:
caching - the client-side caching improves Org Chart performance,
zoom - it allows to use the mouse wheel to zoom in and zoom out in the web part,
collapsing - it allows to expand boxes and see subordinates below if there are any,
number of solid line reports - it shows the number of solid line reports for all users in your structure,
level numbers - it shows the level number in a hierarchy tree for each user.
Note
Go to the last step of the configuration wizard Reset configuration.