Zoom in to Selected with laptop (emulate numpad) Alt buton for numpad "./Del"

Hello. I usually use Blender with a normal keyboard. Yet, the few times I have to use a laptop, I of course check the “emulate numpad” button in the settings. My question though, is what is the new button to zoom in to whatever it is that is selected? Usually I would use the Period “.” / “Del” key, which is at the bottom of the numpad next to the big “0”, and the “Enter” key. What is the new button to do this?