edit my drop down list in numbers 4.0.5.
I created my drop down (pop-up menu) months ago and now find that I need to add a few more categories to it. I use the + button under it and I can add it to my spreadsheet one time. when I go back into my drop down list the category I just added is gone. I know I have done this before but I cannot seem to remember how I did it. I don't see any option that says "save".
Thanks in advance!