Computer Science

Open the Format Cells dialog. : Ctrl+1
Scroll horizontally. : Ctrl+Shift, then scroll your mouse wheel up to go left, down to go right
Zoom in. : CTRL+ALT+=
Cycle through floating shapes, such as text boxes or images. : Ctrl+Alt+5, then the Tab key repeatedly
Exit the floating shape navigation and return to the normal navigation. : Esc
Open the list of validation choices on a cell that has data validation option applied to it. : Alt+Down arrow key
Move to the previous sheet in a workbook. : Ctrl+Page Up
Move one cell to the right in a worksheet. Or, in a protected worksheet, move between unlocked cells. : Tab key
Move one screen up in a worksheet. : Page Up
Move one screen to the left in a worksheet. : Alt+Page Up
Move to the next sheet in a workbook. : Ctrl+Page Down
Move one screen to the right in a worksheet. : Alt+Page Down
Move to the beginning of a worksheet. : Ctrl+Home
Move one screen down in a worksheet. : Page Down
Extend the selection of cells to the last used cell on the worksheet (lower-right corner). : Ctrl+Shift+End
Move to the cell in the upper-left corner of the window when Scroll Lock is turned on. : Home+Scroll Lock
Enter the End mode, move to the next nonblank cell in the same column or row as the active cell, and turn off End mode. If the cells are blank, move to the last cell in the row or column. : End, Arrow key
Move to the last cell on a worksheet, to the lowest used row of the rightmost used column. : Ctrl+End
Move one cell right in a worksheet. : Right arrow key
Move to the edge of the current data region in a worksheet. : Ctrl+Arrow key
Move one cell down in a worksheet. : Down arrow key
Move one cell left in a worksheet. : Left arrow key
Move to the previous cell in a worksheet or the previous option in a dialog. : Shift+Tab
Move one cell up in a worksheet. : Up arrow key
Open a context menu. : Shift+F10
Move to the submenu when a main menu is open or selected. : Left arrow key
When a menu or submenu is open, move to the next command. : Down arrow key
Expand or collapse the ribbon. : Ctrl+F1
Open the list for a selected command. : Down arrow key
Open the menu for a selected button. : Alt+Down arrow key