OS X V10.7 Lion :: Create Keyboard Shortcuts In Safari And Preview?

I've been trying to create a keyboard shortcut for Preview (and perhaps it would work in Safari) so that when I click command and arrow up, the cursor will jump to the top of the document. For example, I'm reading on page 450 of a pdf file and want to go back to the top I'd have to grab the tiny, tiny doodah on the right side of the page and drag it all the way up. In Windows (I do have two Macs and two Windows PCs) you click on control-up arrow and it happens. I tried to modify the keyboard shortcuts in Lion and it does let me do it, but it doesn't work. 

I click on System Preferences, Keyboard, Keyboard Shortcuts, Application Shortcuts. It gives me a choice to add a shortcut by clicking on the plus sign, then I I select Preview and it gives me the choice to write the Menu Title (this is probably the problem) and I write gototop (go to the top of document) and then on Keyboard Shortcut I press command and the up arrow. But it doesn't work. Where do I find the Menu Titles for all programs?

Info:iMac, Lion OSd have to grab the tiny, tiny doodah on the right side of the page and drag it all the way up. In Windows (I do have two Macs and two Windows PCs) you click on control-up arrow and it happens. I tried to modify the keyboard shortcuts in Lion and it does let me do it, but it doesn't