If you want to send someone a personal message, you can do so via a private message. This message is only visible to the person you send it to.

Administrators of this community cannot view the content of private messages. They can only gain insight into the number of sent private messages, the time they were sent and to whom they were sent.

Sending someone a private message for the first time?
 

This can be done in two ways:

1.You can send a private message by hovering over the profile in a topic and clicking on the envelope:

2.You can also click on a profile and then click on the "Send message" button:
 

Have you sent someone a private message before?
Then you can easily find your conversations on your own profile.
You can also send them a new message from here:
 

How to change the private message settings? 
Go to settings and decide who can send you a message and whether you want to receive notifications.