Displays number buttons in the action button window , waits for a user to select a valid choice, and jumps to the corresponding line number. The last option always continues to the next line, even if N line numbers are given. If fewer than N line numbers are given, then the options without matching line numbers simply continue to the next line.
Setting the number of options to 0 prevents the player from making any choice, effectively locking the game. Setting the number of options to greater than 9 causes an overflow and crashes the game. Don't do these things. It's not nice.