function scr_text_increase()
{
    hold = key_select * global.hold_speed;
    if (hold > global.hold_speed)
        hold = global.hold_speed;
    else if (hold <= 0)
        hold = 1;
    characters += (increase * hold);
    if (characters > message_length)
        characters = message_length;
    message_draw = string_copy(message[message_current], 0, characters);
    current_char = string_char_at(message_draw, characters);
}