SHORTCUT            LAPTOP              ALTERNATE           WINDOWS EQUIV       DESCRIPTION

[Scrolling]

HOME/END            FN-LEFT/RIGHT                           none*               scroll view (but not cursor) to top/bottom of document
PAGE_UP/PAGE_DOWN   FN-UP/DOWN                              none*               scroll view (but not cursor) one page up/down
COMMAND-J           COMMAND-J           CTRL-L              ?                   scroll view so that the cursor/selection is centered

[Cursor Movement--adding SHIFT extends selection]

LEFT/RIGHT/UP/DOWN  LEFT/RIGHT/UP/DOWN  CTRL-B/F/P/N        LEFT/RIGHT/UP/DOWN  move cursor (scroll view as needed)
COMMAND-UP/DOWN     COMMAND-UP/DOWN                         CTRL-HOME/END       move cursor to beginning/end of document
COMMAND-LEFT/RIGHT  COMMAND-LEFT/RIGHT  CTRL-A/E            HOME/END            move cursor to beginning/end of line
ALT-PAGE_UP/PG_DOWN ALT-FN-UP/DOWN      ?/CTRL-V            PAGE_UP/PAGE_DOWN   move cursor one page up/down
OPTION-LEFT/RIGHT   OPTION-LEFT/RIGHT                       CTRL-LEFT/RIGHT     move cursor one word left/right

[Editing]

DELETE              DELETE              CTRL-D              BACKSPACE           delete character before cursor
OPTION-DELETE       OPTION-DELETE       CTRL-D              BACKSPACE           delete word before cursor
DELETE >            FN-DELETE           CTRL-H              DELETE              delete character after cursor
                                        CTRL-K              ?                   delete to end of line
                                        CTRL-O              ?                   new line after cursor
                                        CTRL-T              ?                   swap characters before/after cursor
COMMAND-A           COMMAND-A                               CTRL-A              select all
COMMAND-C/X/V       COMMAND-C/X/V                           CTRL-C/X/V          copy/cut/paste
COMMAND-Z           COMMAND-Z                               CTRL-Z              undo
SHIFT-COMMAND-Z     SHIFT-COMMAND-Z                         CTRL-Y/SHFT-CTRL-Z  redo

[Search]

COMMAND-F           COMMAND-F                               ?                   open find dialog (selection is NOT used)
COMMAND-OPTION-F    COMMAND-OPTION-F                        ?                   open replace dialog
COMMAND-E           COMMAND-E                               ?                   use selection for find (but don't start find)
COMMAND-G           COMMAND-G                               ?                   find next
SHIFT-COMMAND-G     SHIFT-COMMAND-G                         ?                   find previous


[Misc]

COMMAND-,           COMMAND-,                               ?                   options
COMMAND-;           COMMAND-;                               ?                   check spelling/grammer



* In the old days, this was what the PC's SCROLL_LOCK key was for. When engaged,
it would lock the cursor in place and instead move just the view when the
PAGE_UP/PAGE_DOWN, CTRL-HOME/CTRL-END, and (rarely) the UP/DOWN keys were
pressed. At some point this stopped working and AFAIK SCROLL_LOCK serves no
purpose.