Question regarding new SST down arrow function ...

[Thomas Okken]

Quote:Added SST↓ (Step Into), which is just an alias for SST. This allows creating a row in the CUSTOM menu with SST↓, SST→, and SST↑, like in typical high-level language debuggers.

It's a different way of spelling SST, just like RDN is a different way of spelling R↓.
The reason for adding that alias is right there in the release note.