Font size Font size option allows you to change chat font size.
Ignore Ignore option allows you to not see any messages sent by the person you have ignored.
Other Rest of the menu show some basic information about that member.
To get to this page click on top right hamburger button, then select settings.
Name colour Name colour option allows you to change your nickname's colour and will appear to others in the selected colour.
A random colour is chosen by default for you when you join the chat.