up arrow command

So this goes along when you are trying to cut / paste or somehting like that. When you press the command key + C you can copy, etc. I was wondering if anyone knew how to use the command when it has an arrow pointing up and then a set of commands. For instance, while I am in Safari and I want to go back to my home page, it will have an arrow pointing up and then command + H, however when I hit the command and H it hides the window. So my question is how do I get the up arrow or what is it?
Any info would be great, thanks.