when I try to send a pm a new window opens up and when I maximize the screen I can see the 2 tabs at the bottom of the screen but just the top tips of them.  can you tell me should I tap the one on the right or the left to send?

If you really need to know, it's the one on the left.

I have no idea why I have to maximize the screen.  If I don't I can't even see the tips of the 2 buttons but when I do maximize I can see that there are 2 tabs to click on.  so the one to the left is send what is the one to the right?

To make it smaller and then you will see the buttons.The same thing happens to me I have to drag at the corners of the message box to make the box smaller and then I can see the send button at the bottom of the screen.