Camera (viewpoint) operation

Camera operation by mouse

Operation Action
Mouse wheel Scaling
Drag with a left click Rotating
Drag with a middle click Moving in parallel
Drag with a right click Scaling

Camera operation by buttons in panel

You can switch the viewpoint to a determined position by clicking the button in the panel at the top right of the screen.

Camera Panel

Click Default to move to the base position, otherwise move to a point of view from each direction.