I'm a VBA newbie and have searched for an answer for how to do this, but must
be doing something wrong when I've tried other codes. I need to have rows
automatically hide or unhide based on a value in column D. If the value in
column D is Y, the row should not be hidden; if the value is N, the row
should be hidden. These values may change, so the rows need to be able to
hide/unhide automatically.

When I've entered codes in before, I click on the tab for this worksheet,
select View Code, choose Insert Module, and then insert the code. There is
already a code in this worksheet for something else, so I can't just add it
in after selecting View Code. Am I putting the code in the wrong spot?
Should I be choosing something else other than Insert Module?

I've tried out so many different codes thinking that was the problem, but
now I think I may just be entering it wrong. I appreciate your help.