Hi,

I found the following navigation in the text of cells in spreadsheets:

Set cursor to start of text  cmd+Home
Set cursor to end of text  cmd+End 

Set cursor to a text position one page up  Page up*
Set cursor to a text position one page down Page down*

*not verifiable because the view of a cell higher than a page will not follow the cursor (issue 94221)

Set cursor to start of line Home
Set cursor to end of line  End

Set cursor to start of text (in cell) cmd+Home
Set cursor to end of text (in cell) cmd+End

Set cursor to start of (previous) word -not defined-
Set cursor to end of (next) word -not defined-

This is Windows style.
In Mac OS Home, End, Page up, Page down is equivalent to moving the scrollers, so they only scroll and 
don't change the focus!


On MacOS it should work like this:

Set cursor to start of text  cmd+Arrow up
Set cursor to end of text    cmd+Arrow down

View start of text (or start of sheet?) Home
View end of text (or end of sheet?)   End

Set cursor to a text position one page up  -not defined-
Set cursor to a text position one page down -not defined-

View a text position one page up (or page up the sheet?)  Page up
View a text position one page down (or page down the sheet?)  Page down

Set cursor to start of line  cmd+Arrow left
Set cursor to end of line   cmd+Arrow right

Set cursor to start of (previous) word  alt+Arrow left *
Set cursor to end of (next) word  alt+Arrow right *

Set cursor to start of (previous) line  alt+Arrow up *
Set cursor to end of (next) line  alt+Arrow down *

*alt key = Option key

For more User Interface Issues see OSXHIGuidelines.pdf