hi
the thrust levers in a boeing are ´conventional´. which means that the thrust lever angle is proportional to the thrust produced.(more or less). the thrust levers are servo coupled to the autothrottle and move with thrust change. you have no so-called detents as in the bus.
the thrust reference settings are controlled by the FMC through the N-1 limit/ thrust limit page, or in case of the 757/767 also through a dedicated panel. the autothrottle system automatically commands the selected thrust when needed, which can be either a thrust limit, idle/retard or as required to acquire/maintain a speed, depending on the active autopilot pitch mode. you can also always command the active thrust limit by pushing a button labeled N1, EPR or THR on the Mode Control Panel on the glareshield. hope this is not too unclear.
S