If Tawk chat is enabled in the system there is a widget available in Self Service Portal home page. The widget look and appearance can be different configured, can as example look like:
NSP chat widget
To start a chat with an agent, just click the widget and start to write a question/message:
NSP chat
If no agent is online the widget is shown as 
. But you can always open widget and
write a question/message. You will get an answer when there is an agent
available.
To end the chat session you select End this chat session in the 
menu:
End chat session
When you end the chat you have the possibility to send a printout of the conversation to an email address. Following form is shown:
Chat session ended
Enter an email address and click Email Transcript.