y 

n/a 

n 

4-5: 

This item has been replaced by items k and l. 

Required 

_ 

_ 

_ 

k: 

In a collection that uses range selection, pressing BSelect on an unselected element sets an anchor on the element, or at the position where BSelect was pressed, and deselects all elements in the collection. If BSelect is released before the drag threshold has been exceeded, then the element under the pointer should be selected. If BSelect Motion exceeds the drag threshold, then a new selection should begin. The anchor and the current position of the pointer determine the current range. As BSelect is dragged through the collection, the current range is highlighted. When BSelect is released, the anchor does not move, and all the elements within the current range are selected. 

Range selection allows the user to select multiple contiguous elements of a collection by pressing and dragging BSelect. 

Required 

_ 

_ 

_ 

l: 

In a collection that uses range selection, pressing BSelect on an currently selected element should not cause all other elements in the selection set to be deselected. If BSelect is released before the drag threshold is exceeded, then, at that point, all other elements should be deselected and the element under the pointer should remain selected. If BSelect Motion exceeds the drag threshold, then no element should be deselected and a drag operation should begin.

Required 

_ 

_ 

_ 

4-6: 

In a text-like collection that uses range selection, the anchor point is the text pointer position when BSelect is pressed, and the current range consists of all elements between the anchor point and the current text pointer position. 

In text-like collections, elements are ordered linearly, and a text pointer is always considered to be between elements at a point near the actual pointer position. 

Required 

_ 

_ 

_ 

4-7: 

In a graphics-like or list-like collection that uses a marquee to indicate the range of a range selection, the current range consists of those elements that fall completely within the marquee. If there is an anchor element, the marquee is always made large enough to enclose it completely. Otherwise, an anchor point is used and is the point at which BSelect was pressed; the anchor point determines one corner of the marquee. If the collection is not arranged as a list or matrix, the marquee is extended to the pointer position. If the collection is arranged as a list or matrix, the marquee is either extended to completely enclose the element under the pointer or extended to the pointer position. Clicking BSelect on a selectable element makes it an anchor element, selects it, and deselects all other elements. 

A marquee, or highlighted rectangle, is often used to indicate the range of a selection in graphics-like and list-like collections. 

Required 

_ 

_ 

_ 

4-8: 

This item has been deleted. 

Required 

_ 

_ 

_ 

m: 

If your application contains collections that follow the range selection model, BAdjust is supported and behaves just like Shift+BSelect, when the BTransfer button is currently configured to behave as BAdjust. 

On a three-button mouse, button 2 is typically used for the BTransfer function. However, in a Common Desktop Environment environment, the user may change an environment setting indicating that mouse button 2 should be used for the BAdjust function instead. BAdjust can be used to extend the selection set in the same manner as Shift+BSelect. 

Required 

_ 

_ 

_ 

n: 

In a collection that uses range selection, when the user presses Shift+BSelect, or BAdjust, the anchor remains unchanged, and an extended range for the selection is determined, based on one of the extension models. 

Optional 

_ 

_ 

_ 

Reselect 

The extended range is determined by the anchor and the current pointer position, in exactly the same manner as when the selection was initially made. 

Optional 

_ 

_ 

_ 

Enlarge Only 

The selection can only be enlarged. The extended range is determined by the anchor and the current pointer position, but then is enlarged to include the current selection. 

Optional 

_ 

_ 

_ 

Balance Beam 

A balance point is defined at the midpoint of the current selection. When the user presses Shift+BSelect or BAdjust on the opposite side of the balance point from the anchor, this model works exactly like the reselect model. When the user presses Shift+BSelect, BAdjust, or starts a navigation action modified by Shift on the same side of the balance point as the anchor, this model moves the anchor to the opposite end of the selection and then works exactly like the reselect model. 

When the user releases BSelect or BAdjust, the anchor does not move, all the elements within the extended range are selected, and all the elements outside of it are deselected.