Q. How to zoom the Scene view?
A. Opt+Ctrl+Drag / Opt+RightClick+Drag; Scroll
Q. How to orbit/rotate the Scene view?
A. Opt+Drag
Q. How to focus the Scene view on the selected object?
A. F (with cursor over the Scene view)
Q. How to use Flythrough mode to navigate in Scene view?
A. With right-click held, WASD / mouse-look
Q. How to move up/down in Flythrough mode?
A. E/Q
Q. What keys switch between the six main tools?
A. QWERTY