atm if i click to show album details
i see
Dave Edmunds
Dave Edmunds Anthology (1983)
track 1
track 2
track 3
track 1
track 2
track 3
You sure?
It should be
Dave Edmunds Anthology
Dave Edmunds (1983)
track 1
track 2
track 3
track 1
track 2
track 3
From your other posts you are also using 3.2 (so you can use the sub grouping header in the Group By menu)
so if you right-click the header menu> Customise Panel...> click to show settings
should bring up this panel

You can see that the Album/ Album Artist (Year) values for the header are not editable.
Here is where you also find sub-grouping header (for tracks)
Before you go any further, decide what you want in to show in your
sub-grouping header: Whatever you use can't be displayed as multi-line. It will only displayed as one line of text.
Now that you have worked out what you want to display, head on over to
Edit Preferences> Tags (1)> Define New Tags
and using the lower section of the New Custom Tag Definition panel, create a virtual tag to put what you want into the display
You can name it anything you like. I named mine
Sub-Header [variable] (catchy isn't it

)
Once created and tested that it works, head back to the Views Configuration panel and select it from the drop-down in sub-grouping header.
As an example, too add disc numbers to multi-disc sets (like your example) you can use something simple like:
$If(<Disc Count>>1,"• Disc "<Disc#>" •",)
This should give you:
Dave Edmunds AnthologyDave Edmunds (1983)
• Disc 1 •track 1
track 2
track 3
• Disc 2 •track 1
track 2
track 3
As I've said before, that virtual tag can become quite complicated and greatly vary the display depending on your tags.
This is my current version
$If(<Disc Count>>1,$If($And($Contains(<Genre Groups>,Classical)="T",$First(<Grouping>)="Album [Compilation]"),$IsNull(<Set Subtitle>,$IsNull(<Conductor [surname]>,"• "<Sort Composer>" •","• "<Sort Composer>" • "<Conductor [surname]>" •"),"• "<Sort Composer>" • "<Set Subtitle>" • "<Conductor [surname]>" •"),$IsNull(<Set Subtitle>,"• Disc "<Disc#>" •","• "<Set Subtitle>" •")),$If($And($Contains(<Path>,Classical)="T",$First(<Grouping>)="Album [Compilation]"),$IsNull(<Set Subtitle>,$IsNull(<Conductor [surname]>,"• "<Sort Composer>" •","• "<Sort Composer>" • "<Conductor [surname]>" •"),"• "<Sort Composer>" • "<Set Subtitle>" • "<Conductor [surname]>" •"),$IsNull(<Set Subtitle>,,"• "<Set Subtitle>" •")))