Origin supports customizing a single point, such as color, shape, size, label, etc. 

If user doesn't change some settings of a single point, then it should still follow the main plot (e.g. user may only want to change a single point color but the size should still follow the main plot).

In Origin 2018, by default <auto> shows for those unchanged settings. So if user modifies main plot settings, special point settings will follow.