Even though they're both adults now, Rita's brother still 'knows how to push her buttons'. [=he is easily able to annoy or frustrate her]
Medical officials says there is no need to 'push the panic button' over two isolated cases of the disease.
With a fax machine, you can send a document across the country with the touch/push of a 'button'.
(..) Oh Rosencrantz, good lads, how do you both? - As the indifferent children of the earth - Happy in that we are not over-happy On fortune's cap we are not the very button - Nor the soles of her shoe? - Neither, my lord Then you live about her waist or in the middle of her favour? (..)2015 Hamlet