Excel 2007 : how to manage your lists

hello everyone.

I made a quote system a few months back (first time in excel) i left it for 2 months and now i have forgot everything!

What i made were a few drop down lists on different tabs and 1 tab was my quote page.

I made a few lists so when i go to Data validation and click lists and price F3 i have a few ready made lists from tabs. What i wanted 2 know is how do i edit them lists? or remove them as i want to make the lists somewhere else on another tab.

If i go to the box that says the coloum and row and click on the arrow you see all my lists. how do i edit them? or delete them

hope you understand me.

Thanks
Dave