He inserted the DVD and pressed the 'play' button.
I could have written a letter in a bottle but waiting for the answer would take a decade, now [with email] it's just a click of a button. (Preliminary English Test; B1; Arabic)
I did up/undid the buttons on my blouse.
It was a long dress with some square buttons [on the] front of it. (Preliminary English Test; B1; Italian)