activated similar to scaling a map on a smartphone in the modes of operation that have been described so far such manipulations of the image 64 will have no effect on the configuration of the sheet 16 other useful gestures involve a wiping movement with the finger over the screen for example if the user wants to align the leftmost boundary of the image with the cut line 66 if no strip line has been defined for that edge of the sheet then he may simply wipe with his finger to the left as another example if the user has moved the image 64 to the center of the sheet 16 in fig4 and he wants to re align the rightmost boundary of the image with the strip line 68 this may be achieved simply by wiping over the screen in the rightward direction analogously vertical wiping movements may align the image with the upper or lower edge of the sheet 16 and diagonal wipes may align a corner of a bounding rectangle of the image 64 with the corresponding corner of the sheet or the central part of the sheet except the blank strips or margins respectively it will be understood that blank margins at the lengthwise edges of the sheet top and bottom edges in the drawings may be defined and configured in the same way as the strips at the.