Hello. I'm sure someone will be able to help me. The number 6 key on my keyboard has three options, typing the number 6, this: ^, and another thing, which is a rectangle with a cross going through it, which apparently means clear. What does it do? What other keys do i need to hold down to make it work? Is there a website that shows what all the symbols mean, what they do, and how to use them? Thanks.