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Keyboard Operation (Win)	Keyboard Operation (Mac)	Action
Right Arrow	Right Arrow	Expand current selection (or go to first child node)
Left Arrow	Left Arrow	Collapse current selection (or go to parent node)
Up Arrow	Up Arrow	Move selection up one node
Down Arrow	Down Arrow	Move selection down one node
Home	Home	Move selection to the first node in the tree
End	End	Move selection to the last node in the tree
Page Up	Page Up	Move the selection up on the first fully visible item on the current page. If the first fully visible item is selected, move the selection on the first fully visible item on the previous page.
Page Down	Page Down	Move selection down on the last fully visible item on the current page. If the last fully visible item is selected, move the selection on the last fully visible item on the next page.
Ctrl-PgDn	Cmd-PgDn	Move focus down on the last fully visible item on the current page. If the last fully visible item is focused, move focus on the last fully visible item on the next page.
Ctrl-PgUp	Cmd-PgUp	Move focus up on the first fully visible item on the current page. If the first fully visible item is focused, move focus on the first fully visible item on the previous page.
Ctrl-A	Cmd-A	Select all nodes in the tree. Focus remains on the same item.
Shift-Up Arrow	Shift-Up Arrow	Extend selection up one node In single selection mode, Shift key should be ignored and only Up Arrow key should be processed. See description of Up Arrow behavior for more details.
Shift-Down Arrow	Shift-Down Arrow	Extend selection down one node In single selection mode, Shift key should be ignored and only Down Arrow key should be processed. See description of Down Arrow behavior for more details.
Shift-Home	Shift-Home	Extend selection to the top of the tree In single selection mode, Shift key should be ignored and only Home key should be processed. See description of Home behavior for more details.
ShiftShift-End	Shift-End	Extend selection to the bottom of the tree In single selection mode, Shift key should be ignored and only End key should be processed. See description of End behavior for more details.
Shift-PgUp	Shift-PgUp	Select all items between anchor and the first fully visible item on the current page. If the first fully visible item is already included in the selection, extend the selection to the first fully visible item on the previous page. All previous selections, if applicable, are canceled. Available in multi-selection mode only. In single selection mode, Shift key should be ignored and only PgUp key should be processed. See description of PgUp behavior for more details.
Shift-PgDn	Shift-PgDn	Select all items between anchor and the last fully visible item on the current page. If the last fully visible item is already included in the selection, extend the selection to the last fully visible item on the next page. All previous selections, if applicable, are canceled. Available in multi-selection mode only. In single selection mode, Shift key should be ignored and only PgDn key should be processed. See description of PgDn behavior for more details.
F2	F2	Rename selected node
Enter	Enter	Save changes made to the selected node
Esc	Esc	Cancel changes made to the selected node
Ctrl-Up Arrow	Cmd-Up Arrow	Move focus up one node
Ctrl-Down Arrow	Cmd-Down Arrow	Move focus down one node
Ctrl-Home	Cmd-Home	Move focus to the first node in the tree
Ctrl-End	Cmd-End	Move selection to the last node in the tree
Space	Space	Select a single node, create anchor.
Ctrl-Space	Ctrl-Cmd-Space	Select/Deselect a single node, create anchor.
Shift-Space	Shift-Space	Select a range of nodes In single selection mode, Shift key should be ignored and only Space key should be processed. See description of Space behavior for more details.
*	* (numlock)	* (numlock)	* (numlock)	Expand everything
+ (numlock)	+ (numlock)	Expand current selection
- (numlock)	- (numlock)	Collapse current selection
Ctrl-Shift-Up	Cmd-Shift-Up	Expands selection up by one item. Only in multi-selection modes. If focus is on an unselected item, pressing Ctrl-Shift-Up selects all items between anchor and the item which is right above the focused item. The item which is right above the focused item is also included in the selection. Available in multi-selection mode only. In single selection mode, Shift key should be ignored and only Ctrl-Up (Cmd-Up) should be processed. See description of Ctrl-Up behavior for more details.
Ctrl-Shift-Down	Cmd-Shift-Down	Expands	Ctrl-Shift-Down	Cmd-Shift-Down	Expands selection down by one item. Only in multi-selection modes. If focus is on an unselected item, pressing Ctrl-Shift-Down selects all items between anchor and the item which is right below the focused item. The item which is right below the focused the focused item is also included in the selection. Available in multi-selection mode only. In single selection mode, Shift key should be ignored and only Ctrl-Down (Cmd-Down) should be processed. See description of Ctrl-Down behavior for more details.
Ctrl-Shift-Space	Cmd-Shift-Space	Selects all items between anchor and focused item. Focused item is also included in the selection. Create anchor. Available in multi-selection mode only. In single selection mode, Shift key should be ignored and only Ctrl-Space (Cmd-Space) should be processed. See description of Ctrl-Space behavior for more details.
Ctrl-Shift-SpaceHome	Cmd-Shift-SpaceHome	Selects all items between anchor and focused item. Focused item is also included in the selection. Create anchor the first item. Available in multi-selection mode only. In single selection mode, Shift key should be ignored and only Ctrl-Home (Cmd-Home) should be processed. See description of Ctrl-Home behavior for more details.
Ctrl-Shift-HomeEnd	Cmd-Shift-HomeEnd	Selects all items between anchor and the first last item. Available in multi-selection mode only. In single selection mode, Shift key should be ignored and only Ctrl- Shift- End (Cmd- Shift-EndSelects all items between anchor and the last item. Available in multi-selection mode only End) should be processed. See description of Ctrl-End behavior for more details.
Ctrl-Shift-PageUp	Cmd-Shift-PageUp	Select all items between anchor and the first fully visible item on the current page. If the first fully visible item is already included in the selection, extend the selection to the first fully visible item on the previous page. Available in multi-selection mode only item on the previous page. Available in multi-selection mode only. In single selection mode, Shift key should be ignored and only Ctrl-PageUp (Cmd-PageUp) should be processed. See description of Ctrl-PageUp behavior for more details.
Ctrl-Shift-PageDown	Cmd-Shift-PageDown	Select all items between anchor and the last fully visible item on the current page. If the last fully visible item is already included in the selection, extend the selection to the last fully visible item on the next page. Available in multi-selection mode only. In single selection mode, Shift key should be ignored and only Ctrl-PageDown (Cmd-PageDown) should be processed. See description of Ctrl-PageDown behavior for more details.

4. OPEN ISSUES

Issue.Tree.1: It should be possible for the application developer to add a checkbox and at least two more icons for each node. This topic will be addressed in a more detailed manner in the horizontal (or cross-control) specification for custom list cell for each node to address very common UX use cases. We would suggest having at least one list cell implementation that can meet these requirements "out of the box".
Issue.Tree.2: It is possible that the title bar is may be implemented as a separate control that can be added on to controls such as the tree, table, tree-table, accordion and list.