Abstract: A first single-action input is received indicating a start tracking request and including information identifying a first current location of a user-controlled object on a user display device. A second single-action input is received indicating a movement of the object across the display device to a first different location and including a stop tracking request. A first display object associated with the first current location and a second display object associated with the first different location are determined. A group of selected display objects is determined including the first and second display objects. Display objects associated with locations displayed in an area spanning a first region located between the first current location and the first different location are determined, where a selection of the selected display objects is based on the first start tracking request and the first stop tracking request, with no input associated with a modifier input.

Abstract: A first single-action input is received indicating a start tracking request and including information identifying a first current location of a user-controlled object on a user display device. A second single-action input is received indicating a movement of the object across the display device to a first different location and including a stop tracking request. A first display object associated with the first current location and a second display object associated with the first different location are determined. A group of selected display objects is determined including the first and second display objects. Display objects associated with locations displayed in an area spanning a first region located between the first current location and the first different location are determined, where a selection of the selected display objects is based on the first start tracking request and the first stop tracking request, with no input associated with a modifier input.