NOTES button to add notes, under Lead Details not there????

NOTES button to add notes, under Lead Details not there????

Can someone tell me why in the FREE personal edition I am not seeing a button to click on that says NOTES when I view each lead detail?

Obviously I would like to add notes when I call a potential client and this is making it a bit hard to do when I can't even find it.

My friend has the paid edition and hers shows it but mine does not?

So where could it be hidiing??? :?