A mobile communication terminal comprising: a processor configured to control operation of the mobile communication terminal including being configured to receive input from a user through an input component of a user interface of the terminal, and to run an application on said terminal; said processor also being configured to cause a display component of the user interface to show a partitioned application area with two or more application area sections (22a, 22b) when an application is running on the terminal; said processor further being configured to at least temporarily define an initial one of said application area sections as a larger application area section as shown within the partitioned application area, and simultaneously at least temporarily define a complementary one of said application area sections as a smaller application area section as shown within the partitioned application area; said processor being configured to cause the display component to display in said initial application area section a plurality of selectable items with one of the items highlighted, and in said complementary application area section details of the highlighted item; said processor moreover being configured to at least temporarily redefine said initial one of said application area sections as a smaller application area section as shown within the partitioned application area and simultaneously at least temporarily redefine said complementary one of said application area sections as a larger application area section as shown within the partitioned application area when the user selects the highlighted item in said initial one of said application area sections, wherein the amount of information concerning the highlighted item, shown in the complementary application area section, is increased when said complementary application area section becomes the larger application area section; said processor being configured to allocate a ratio of respective areas between the larger application area section and the smaller application area section within said partitioned application area. a processor configured to control operation of the mobile communication terminal including being configured to receive input from a user through an input component of a user interface of the terminal, and to run an application on said terminal; said processor also being configured to cause a display component of the user interface to show a partitioned application area with two or more application area sections (22a, 22b) when an application is running on the terminal; said processor further being configured to at least temporarily define an initial one of said application area sections as a larger application area section as shown within the partitioned application area, and simultaneously at least temporarily define a complementary one of said application area sections as a smaller application area section as shown within the partitioned application area; said processor being configured to cause the display component to display in said initial application area section a plurality of selectable items with one of the items highlighted, and in said complementary application area section details of the highlighted item; said processor moreover being configured to at least temporarily redefine said initial one of said application area sections as a smaller application area section as shown within the partitioned application area and simultaneously at least temporarily redefine said complementary one of said application area sections as a larger application area section as shown within the partitioned application area when the user selects the highlighted item in said initial one of said application area sections, wherein the amount of information concerning the highlighted item, shown in the complementary application area section, is increased when said complementary application area section becomes the larger application area section; said processor being configured to allocate a ratio of respective areas between the larger application area section and the smaller application area section within said partitioned application area.