Attending events feature

Hello

I am looking at the functionality of events Manager and am confused somewhat.

In buddypress profile it has a menu under events labelled ‘attending’ now these seem to represent the events listed by the author.

So the questions I have are:

1. How will a any user select an ‘attending event’ icon so that it shows up on their profile?

2. How does the listing author remove that their attending an event that they have listed?

Thank in advance for your help