OK, I’ll try to explain in some more detail:
Without Secure Copy Content Protection and Content Locking the context menu appears on right click on desktop. On mobile/tablet the context menu appears when holding a finger for more than app. on second (long press).
Secure Copy Content Protection and Content Locking should disable the context menu on desktop and on touch screen devices. This works fine on desktop devices – on touch screen devices it only works when the browser settings requests the mobile version of the website. If the browser is set to request the desktop version, the context menu appears by “long press”.
Example: Chrome browser on iPhone. By tapping the three dots in lower right corner a menu appears. One of the menu points allows the user to set up the browser to request either desktop or mobile version of the website.