Choose yes, no or dont know with right click of cell

[Robert]

Hello,

I am looking to create an excel sheet where I have to place the value of
yes, no or dont know to the relivant cells.

How do I set this up so right clicking a cell shows these three values.

 

[Frank Kabel]

Hi
not with a right-click but with a listbox. See:
http://www.contextures.com/xlDataVal01.html