XmListSetPos(3) on Linux
The text 61b69b95b7f1, 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 the item at the given position the first visible position in the list "XmListSetPos" "List functions" "XmListSetPos"