Current way of navigating the 3D perspective view is not very convenient. We use the perspective view in Maxsurf Modeller a lot especially, to glance over the geometry from different angles to inspect fairness. It would help if navigation in this view would be similar to what is commonly seen in other 3D cad systems, e.g. scroll wheel = zoom, hold RMB = orbit, CRTL + hold RMB = pan.