Abstract: An interactive computing device comprises a display (2) includes fish-eye areas (4) and (6) for displaying information concerning a plurality of function items in the form of a list or table. The selection of an item results in an increase in the area of the display used to display the selected item, while leaving the area of the display used by non-selected items unchanged. The selection also results in the presentation within the increased area of the information provided in the list before the item was selected together with additional information pertaining to the selected item; and also results in the presentation within the increased fish-eye area of additional command options and related screen controls applicable only to selected items, rather than to the whole list or the activation of which causes the device to carry out the appropriate action.

Abstract: An interactive computing device is provided with a single step back navigation model. With the navigation model of the present invention only a single previous state that will be accessible with a BACK key or button on the device is remembered. This retains the ability for the user to be returned to the previous view in the original application when the chained task is completed.

Abstract: A method in bleaching of pulp is described, in which the pulp is subjected to a peroxide bleaching step, whereupon the pulp is washed and the washing liquid from the washing is separated from the pulp in the form of a filtrate. The method is characterised in that the filtrate is treated with an aluminium compound, such as aluminium sulphate or polyaluminium sulphate, for precipitation of interfering substances, such as oxygen-demanding organic material and metals, that the precipitated material is removed from the filtrate, that the aluminium content of the filtrate after precipitation of interfering substances is adjusted to at most 20 ppm, and that the filtrate is then recirculated to the peroxide bleaching step. By the method, a reduced consumption of hydrogen peroxide in the peroxide bleaching step is achieved.