Need a bit of help editing the Terminal theme

[Mido]

Hey,
I'm using this theme: https://themes.rockbox.org/index.php?themeid=1739&target=ipod6g

However instead of the song name in "Current: " all I see is "N/A". That's probably because my songs don't use any ID3 tags. I suspect that this theme takes Artist field and Title field and slaps them together. I would like this theme to show a file name instead.

I tried to edit it based on this and this but I'm not finding the tags I'm looking for, just some "viewports".

EDIT: Okay, I made it. Had to edit %s%?ia<%ia - %it|N/A> into %?fm<%fm|N/A>