It's not the A-Z jumper bar really. It's the column browser, 2 columns - vertical. One with "YYYY" and the other using a virtual tag "A-Z" [$Group($Sort(<Album Artist>),1)]. Can't take the credit for this one, came from the post
The "Released:" date is a combination of a custom tag and a virtual tag. I have a custom tag <Release Date Sort> with the format YYYYMMDD that I have set up to use for sorting.
This allows for the use 20150000 if you only know the year, or 20150200 if you don't know the exact day. Something that can't be done if you use the year/date tag.
Released: $If($Right(<Release Date Sort>,4)=0000,<YYYY>,$If($Right($Right(<Release Date Sort>,4),2)=00,$If($Left($Right(<Release Date Sort>,4),2)=01,"Jan "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=02,"Feb "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=03,"Mar "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=04,"Apr "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=05,"May "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=06,"Jun "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=07,"Jul "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=08,"Aug "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=09,"Sep "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=10,"Oct "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=11,"Nov "<YYYY>,"Dec "<YYYY>))))))))))),$If($Left($Right($Right(<Release Date Sort>,4),2),1)=0,$Right($Right(<Release Date Sort>,4),1),$Right($Right(<Release Date Sort>,4),2))" "$If($Left($Right(<Release Date Sort>,4),2)=01,"Jan "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=02,"Feb "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=03,"Mar "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=04,"Apr "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=05,"May "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=06,"Jun "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=07,"Jul "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=08,"Aug "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=09,"Sep "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=10,"Oct "<YYYY>,$If($Left($Right(<Release Date Sort>,4),2)=11,"Nov "<YYYY>,"Dec "<YYYY>)))))))))))))
to convert to the format DD Mon YYYY.
It can then be used in the "Album and Tracks Layout" for the RH grouping header.