Hi,
There are bindings in the Edit > Buttons > Camera, section.. to control how the camera moves. So you should be able to get it similar to other programs. I plan to add an option to toggle between a freelook mode and the normal mode in the future.
Otherwise, the controls are designed to be intuitive, and similar to 2d paint applications. Such as photoshop, where you can hold space bar and click to pan the canvas.