I always use the 'padlock' feature top left of the screen.
As an aside, when I first took delivery of my MS two years ago, my son (who has always wanted me to buy a Tesla) didn't know of my intended purchase. I phoned him on my way home and asked him to meet me outside our house to go shopping with the intention of giving him a surprise. Imagine his surprise when I rolled up in my new Tesla. Imagine my surprise when I had no idea how to let him in!!! In the end I activated the passenger window and he reached in and opened the door using the interior pull handle. Still gets a few laughs and my leg pulled frequently.