Q: Where is the "send a gift" button at the bottom of the main page???

That would be on a iOS device. Is that what you're using? If so, what device and what version of iOS is it running?

You're looking only at the information for iOS devices and that doesn't apply to iTunes on a computer. Read the section titled "Mac or PC" in the article from which you came. Then if you still have difficulties, post back with details as to the problem you're encountering.

Regards.

I found this thread after all day searching for an answer. The problem I still can't find an answer for is "How to gift an app". All I find is how to send a monetary gift, not an option to gift a specific app like it used to be befor iTunes 11.

http://support.apple.com/kb/HT2736