A method and device are described for determining input regions that are affected by a user input at a graphical user interface, GUI. For each input region, the following are associated with one another: (i) an actuation level of the input region, (ii) an allocation of the input region to a region of the GUI, and (iii) a blocking type of the input region. The method includes detecting a user input, wherein the user input is allocated an input position on the GUI. The method additionally includes determining at least one input region that contains the input position. Finally, the method includes evaluating the blocking type allocated to that input region in order to determine whether the user input to at least one lower-ranking input region that contains the input position is blocked.