Use "additional artists" in custom strings

[Bigmack3000]

Issue description:

Hey, I would like to put additional artists and composers on the same line with a custom string, but i don’t see what to use for additional artists on this page:

Symfonium custom string template (v12+)

In the now playing screens (compact and expanded), custom strings can be used to display whatever you like. You can enter plain text there, but of course there are placeholders available that are replaced with information about the currently playing track. Basic string replacement The basic syntax for these placeholders is easy: %fieldname% You have to give the precise name of the field between the percent signs (%). Everything including the percent signs will be replaced with the contents of …

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Additional information:

 
Also, would it be possible to have “original relase date” added as an option? Thanks.
 

Reproduction steps:

 

 

Media provider:

Subsonic

Screenshots:

     

[Tolriq]

It’s all in the doc, use albumartist and composer field and apply the conditions or display that you want.

[Bigmack3000]

So album artist and additional artists are the same thing?

[Tolriq]

No Additional artists is both albums and composers whatever is different from display artists.

[edjnot]

Would it be possible for PUBLISHER/LABEL to be added to the string tags please?