Use the following mouse actions to navigate the DBF environment.
Select Object : Left-Click
Select object at mouse position.
De-select Object : Left-Click
If an object or group is selected, de-select current object.
Box selection : Left-click + Drag
Creates a selection box, allowing you to select multiple objects
Camera and Viewport
Zoom In / Zoom Out : Mouse-Wheel
Use the the scroll whell of your mouse in order to zoom in and out.
Pan View : Right click + Hold
Right click + Hold in order to pan around the 3d enviroment.
Orbit View : Left click + Hold
Left click + Hold in order to orbit around the 3d environment.