https://docs.oracle.com/cd/E86824_01/html/E54767/mvaddch-3curses.html
mvaddch - man pages section 3: Curses Library Functions
curs_addch , addch , waddch , mvaddch , mvwaddch , echochar , wechochar - add a character (with attributes) to a curses window and advance cursor
man pagessectioncurseslibraryfunctions