fixing rain totals

So I want to go back and fix the rain totals for nov 2009. How would I do that?

control panel, Rain chart, use the manual rain entry for that month and year

oh thanks! I did that but it didnt take effect right away. I see that I have to click ok then go back into it… now it works. thx! Keep up the great work on the program windy! I love this program for my weather station!!