Hi Dane
In addition to what Jerry mentioned about the "Enter" key and the
"Return" key on the Mac:
In some Spreadsheet apps the "Return" key will confirm the entry and
move you down one cell whereas the "Enter" key will simply confirm
the entry and leave you in the same cell.
In some Word processors, the "Enter" key when pressed will insert a
page break in contrast to what the "return" key does.
another thing that may be of interest to you is the ability to have
the number pad, Page UP/down, Home/end and Insert/Del keys by
pressing cmd+f6 on your laptop. Press the cmd+f6 first then turn
Keyboard Practice on and see what you find on the right hand side of
your keyboard.
Not sure if this is new information to you but thought it worth the
note.
Later...
Tim Kilburn
& Carter the Canine
Fort McMurray, AB Canada