Two questions:

1) How do I add check boxes to items?  I see the check box on the Control
Toolbar but how do I add them to cells?  Does the worksheet need to be
protected first?

2) There is a drop down list of items already in a cell on the spreadsheet.  
It is not visible until one clicks the cell. Then you see the arrow and the
list.  I would like to get into the list to put a value at the top that says
"choose an option" AND have that option show so that people know to click the
cell.  Again, do I need to protect the worksheet?

Thanks very much,
Kathy