XmTextSetTopCharacter(3) on Linux
The text b1d5d2e0cd51, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
A Text function that sets the position of the first character displayed "XmTextSetTopCharacter" "Text functions" "XmTextSetTopCharacter"