It would be awesome to have a quick edit button at the top of the screen, like it is at the bottom. I know that it's accessible at the bottom of the screen, however I think it would be easier for users to have it placed there as well.
There is an option in the Actions menu, which is at the top of the page, to let you edit the record you're viewing. It's 2 clicks, but it's often easier than scrolling down to the Edit button.
You also have the ability to use keyboard shortcuts for quick actions. The keyboard shortcut for editing a record is clicking the "e" key on your keyboard. You can access the hot keys by clicking Shift+?. Here is the keyboard shortcuts available: