Question About Message List in Apple Mail

Hi,

I have a question about navigating the message list in Apple Mail on the Mac. I’m running Mail in Yosemite with VoiceOver. I have hundreds of messages in my inbox. Instead of moving up and down one message at a time with the up- and down arrows, are there commands to make larger jumps through the list of messages, such as a whole screen-s worth at a time? Are there commands to go to the top and bottom messages in the Inbox. According to Tim Sniffen’s book on “Mastering the Mac”, Command plus Option plus uparrow should go to the top of the list, and Command plus Option plus downarrow to the last message, but these commands don’t seem to be working.

I’d appreciate any help or suggestions.

Thanks!