How to make appointment reminder louder and a ring tone

[AC Question]

The appointment sound selection loudness and duration settings can't be found on the samsung note 4.
Is there such an option

 

[ManiacJoe]

Which phone?
Which version of android?
Which carrier?
Which calendar/appointment app?

In your calendar/appointment app, check its settings for reminders and notifications.
In your phone's volume settings, there should be separate options for the ringtones vs notifications vs apps.