Keys for the task pane

F6
Move to a task pane from another pane in the program window. (You might need to press F6 more than once.)
CTRL+TAB
When a menu or toolbar is active, move to a task pane. (You might need to press CTRL+TAB more than once.)
TAB or SHIFT+TAB
When a task pane is active, select the next or previous option in the task pane
CTRL+DOWN ARROW
Display the full set of commands on the task pane menu
DOWN ARROW or UP ARROW
Move among choices in a selected submenu; move among certain options in a group of options
LEFT ARROW or RIGHT ARROW
Select the menu to the left or right, or, with a submenu visible, switch between the main menu and the submenu
SPACEBAR or ENTER
Open the selected menu, or perform the action assigned to the selected button
SHIFT+F10
Open a shortcut menu; open a drop-down menu for the selected gallery item
HOME or END
When a menu or submenu is visible, select the first or last command on the menu or submenu
PAGE UP
Move up one page
PAGE DOWN
Move down one page
CTRL+HOME or CTRL+END
Move to the top or bottom of a list