XmListSetBottomItem(3) on Linux
The text e2ec7e422c4c, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
A List function that makes an existing item the last visible item in the list "XmListSetBottomItem" "List functions" "XmListSetBottomItem"