Shortcut for Jumping to Author (starting letter)?

As my Calibre library gets bigger, it would be very useful to have a Keyboard Shortcut to "jump" to a letter of the alphabet for an author. My library always opens in alphabetical order by author--I think this is the default. If I want to go to books by Henry James, for example, I have to scroll down to find the J's-- a lot of scrolling. I know I can drag the slider down at the right side, but that's very inexact. It would be great to be able to hit a keyboard shortcut and jump to the J's. Does it exist? Can a user create this?

Thanks for any help--