find_y
int find_y(LINE *match_line);
move_to(find_x(start_line, start_textp), find_y(start_line));
move(0, program->start_ptr, find_y(match_line));
move_to(x, find_y(line));
move_to(length_of(line_buffer), find_y(line));
move_to(0, find_y(line->next));