Extended functions for Logitech G700 should be setup according to the documentation

 

KeyFunction

Mouse Wheel 

Focus steps

Shift (keyboard) + Wheel

or

Mouse Button G9 + Wheel (Logitech G700 only)

Precise Focus (0.3x step)
Right Mouse Button + WheelZoom steps

Mouse Button G10 + Wheel (Logitech G700 only)

or

Ctrl (keyboard) + Wheel

Large (predefined) zoom steps
Mouse Button G5  (Logitech G700 only)Increase aperture
Mouse Button G4 (Logitech G700 only)Decrease aperture
Mouse Button G7 (Logitech G700 only)Increase exposure
Mouse Button G6 (Logitech G700 only)Decrease exposure
Button G11 (Logitech G700 only)Start/Stop video recordin