A machine (1) for preparing a beverage has: a beverage preparation module for processing one or more beverage ingredients and for dispensing a beverage resulting therefrom; a unit for controlling such processing in accordance with a parameter set to a value stored in the unit; and a user-interface (20) connected to the control unit for acquiring the value from a user and storing the value in the control unit. The user-interface has a first user-selector (21) associated with a first value for the parameter and a second user-selector (22) associated with a second value for the parameter. The first and second user-selectors (21, 22) each comprises a user-actuation adjustment direction (211, 221) for shifting on user-actuation in the adjustment direction the value associated with the user-selector to a user-selected adjusted value selected from a range of values associated with the user-selector. Furthermore, each of the user-selectors comprises a user-actuation initiation direction (212, 222) for initiating on user-actuation in the initiation direction: the control unit to store the user-selected adjusted value as the stored value; and/or the processing in accordance with the parameter set to the user-selected adjusted value as said stored value.