Great idea! I've added your votes for these two feature requests for a future update.
I'd like to take this a little further and be able to specify the checkin by demographic - ie. child, youth, adult...
I'd like to add a vote for both of these things :-)
We use check in for kids church on Sunday with labels, youth on Friday without labels and young adults events without labels and apart from wanting to search within one demographic only, the fact that the button says finish and print labels at events without labels often causes confusion.
I've added your support to this request.