[Frank Cox]

On the list of song titles under both Songs and Recent, there's a song title then second line with a - for each entry.

Looking at the manual, page 9 shows that screen with Chopin, Beethoven etc occupying that line.

So from that I assume that second line is intended to display a field that none of the entries for my current songs has populated.

Which leads me to two questions that I haven't found the answers to in the manual.  (Not that the answers aren't there; I just haven't manage to find them, probably because I'm not sure exactly what I'm looking for.)

1. What is the name of the field that populates that line?
2. Can that be changed, i.e. if it's field X that populates the line by default, can I tell it to use field Y instead?

[samibe]

It displays whatever is on the Artist and Album fields. 

I use the Artist field to list the composer (i.e. Sergei Rachmaninoff), band, arrangers, and sometimes editors (whatever applies). 
I use the Album field to list the book a song came out of, the larger work it might be part of, the movie/musical/show it comes from and/or the audio album it's from.

[Skip]

Check Settings>Library Settings>Song Title  Formatting. I don't know about the dash[-] though.

[Frank Cox]

Wonderful!  Thank you ever so much, guys!

I just put the book title into Album and the author/composer into Artist and now I have a much more informative main display window.

Thanks!

[Skip]

That sub title line can be changed, just tap 'Song Title Formatting'>'Caption Format' and a popup with all the options appears. They  display in the same order as entered. The same for 'Title Format'.

[itsme]

My favourite settings are
Title Format:
%TITLE% %KEYS:- ${VALUE}% %SORT_TITLE:<${VALUE}>%%CUSTOM_GROUPS:(${VALUE})%
I use CUSTOM_GROUPS for alternative titles
Using ${VALUE} takes care that the - and the brackets are not displayed in case the respective fields are not filled
Caption Format:
%CUSTOM:${VALUE} %%RATING%* %CUSTOM2% (%SOURCE_TYPES%) %PAGE_ORDER% %FILE_NAMES%

[itsme]

@Mike:
With relatively sophisticated settings like mine it is a bit inconvenient to edit them.
So it would be great if I could have several of them that I can activate / deactivate by just checking / unchecking a checkbox for each variant.
It would even be useful to allow more than one caption line to be activated by these checkboxes
(two line captions by adding a line feed into the caption format already works)
My usecase: a caption line to be used on stage and a different one for maintaining my library.
Currently I store formats in a text file and exchange them via copy/paste.

[Zubersoft]

I can certainly add something akin to a "favorites" where you could store your commonly used format strings, but I'm not sure about checking/unchecking each variant, as I'm not sure what that means in the context of a single format string. I don't plan on supporting multiple captions on different lines at the moment, but I can certainly consider that in the future if it will be useful to people. 

Mike

[itsme]

Storing and reloading formats similar to the implementation of user defined filters would also be a nice way to do it. To be honest: I'm not sure if many users will use it.