From Longman Dictionary of Contemporary Englishwith/at the touch of a button/keywith/at the touch of a button/keyused to emphasize that something can be done very easily by pressing a button This card allows you to access your money at the touch of a button. You can get all the latest information with the touch of a button. → touch
Examples from the Corpus
with/at the touch of a button/key• At the touch of a button a huge gate opens and I am confined in a small area between fences.• At the touch of a button they can still be made to disappear.• A customer uses her remote control to shop different channels with the touch of a button.• Up to ten needles can be operated separately by computer programme producing endless designs and colourways at the touch of a button.• Letters, words or whole lines can be deleted and new texts inserted at the touch of a button.• An oil dispensing massage head dispenses oil at the touch of a button to give a smooth, drag free massage.• You can add categories and recipes at the touch of a button.• Jet start operates for 30 seconds at the touch of a button. 