Note Composer: How to set the name of the extracted file to originaltitle_extractedtitle

Things I have tried

  • in Note Composer settings, “Template file location” to {{fromtitle}}-{{newtitle}}
  • Bring up “Extract current selection”, hit CMD+Enter

What I’m trying to do

I want to extract parts of the current note using note composer, which works fine. But i cannot figure out how to set the file name of the new file as this:
sourcefile_newfile.md

So if i have a have a page called “Fruits”, and a Header called “Apple” and i extract the Apple part, i want the file name to be

fruits_apple.md

Is this possible? Thanks!