Method for adjusting a hearing system to individual hearing needs and preferences of a specific hearing system user by means of a fitting system comprising a visual display, said method comprising the steps of a) presenting on said visual display a visualization simultaneously visualizing - for each of a group of data sets: whether or not the respective data set is accessible to a user of said fitting system; and - for each device selected in said fitting system to be part of said hearing system: whether or not the respective device (11;12;13) is accessible to a user of said fitting system; by b1) displaying on said visual display a graphics object (33a, 33b,...) representing the respective data set or device (11;12;13), in case the respective data set and the respective device, respectively, is accessible to a user of said fitting system within said fitting system; and b2) not displaying on said visual display a graphics object (33a, 33b,...) representing the respective data set or device (11;12;13), in case the respective data set and the respective device, respectively, is not accessible to a user of said fitting system within said fitting system, characterized in that when a change occurs in the fitting system, carrying out the step of c) checking for an incompatibility of said change in the fitting system with at least one of said data sets accessible to a user of the fitting system and/or with at least one of said devices (11; 12; 13) accessible to a user of the fitting system; and, if at least one such incompatibility is detected for at least one of said data sets or devices (11;12;13), carrying out for each data set and device (11;12;13), respectively, for which such an incompatibility has been detected, the step of d) displaying on said visual display an amended graphics object (33a'; 33f'; 33h') representing the respective data set or device (11;12;13); wherein the amendment to the graphics object (33a; 33b;...) indicates the incompatibility to the user of the fitting system, and wherein in step c), it is checked for an incompatibility of said change in the fitting system with a predetermined selection of said data sets accessible to a user of the fitting system and/or with a predetermined selection of said devices (11;12;13) accessible to a user of the fitting system, and wherein said change in the fitting system is a change in one of said data sets accessible to a user of the fitting system or in one of said devices (11;12;13) accessible to a user of the fitting system, and wherein said predetermined selection does not comprise that one data set and that one device (11;12;13), respectively, and wherein steps c) and d) are carried out automatically by said fitting system. a) presenting on said visual display a visualization simultaneously visualizing - for each of a group of data sets: whether or not the respective data set is accessible to a user of said fitting system; and - for each device selected in said fitting system to be part of said hearing system: whether or not the respective device (11;12;13) is accessible to a user of said fitting system; by - for each of a group of data sets: whether or not the respective data set is accessible to a user of said fitting system; and - for each device selected in said fitting system to be part of said hearing system: whether or not the respective device (11;12;13) is accessible to a user of said fitting system; b1) displaying on said visual display a graphics object (33a, 33b,...) representing the respective data set or device (11;12;13), in case the respective data set and the respective device, respectively, is accessible to a user of said fitting system within said fitting system; and b2) not displaying on said visual display a graphics object (33a, 33b,...) representing the respective data set or device (11;12;13), in case the respective data set and the respective device, respectively, is not accessible to a user of said fitting system within said fitting system, characterized in that when a change occurs in the fitting system, carrying out the step of c) checking for an incompatibility of said change in the fitting system with at least one of said data sets accessible to a user of the fitting system and/or with at least one of said devices (11; 12; 13) accessible to a user of the fitting system; and, if at least one such incompatibility is detected for at least one of said data sets or devices (11;12;13), carrying out for each data set and device (11;12;13), respectively, for which such an incompatibility has been detected, the step of d) displaying on said visual display an amended graphics object (33a'; 33f'; 33h') representing the respective data set or device (11;12;13);