== The main window at startup ==

{{gvb:1.png|The main window at startup}}

== Changing graphical appearance ==

{{gvb:2.png|Changing graphical appearance}}

== Changing calculation method ==

{{gvb:3.png|Changing calculation method}}

== The Options menu ==

{{gvb:4.png|The Options menu}}

== 2-dimensional simulation with speeds ==
Notice that if a discrete calculation method is selected, it is possible to change time step.

{{gvb:5.png|2-dimensional simulation with speeds}}

== The "starting position editor", one dimension ==

{{gvb:6.png|The "starting position editor", one dimension}}

== The "starting position editor", two dimensions ==

{{gvb:7.png|The "starting position editor", two dimensions}}