Based on a snippet from the trunk, this tool hides unused note, effect and/or volume/panning/delay columns (and turns hidden ones with values in them back on).
It can also delete tracks without notes in them, but note that it does NOT take devices or automation into account, only notes. So if you generate sound with effects only etc, handle that option with care.
Delete Unused Tracks was an existing script that had been embedded natively since Renoise 2.5, so no real need to add that into this tool as it currently already exists.
Obviously can’t do that as two samples in the same column may overlap each other, then you will be going into NNA settings for playing sample rather than letting them both play at once.