I want to create a detail custom button named 'Maps' in contact object. I created custom button the proper way. I added the button in proper page layout along with some other standard and custom buttons. On checking the details page, I did not see any custom buttons. The layout was not followed. I saved and refreshed but to no avail. The layout is followed in classic mode but not in lightning mode. Other display types except Detail Page Button work. They open the URL but behavior is not followed. It always opens URL in a new window. Please help.