1.First you will need to navigate to your chat window.
2.You will see tabs at the top, you start off with 4. Overall, Personal, Battle and System. Here, you are able to edit the channels which you can see. You can also create a 5th channel and name it yourself.
Right click on the tab you want to edit. System and Battle, cannot be edited and select ‘Edit’, doing so will bring up the Channel Settings.
3.Currently, we are aware of the issue within the Region, Level and School channels, so you can tick them off to prevent being spammed.
4.Once you have selected the channels you want to mute, or activate you can select ‘OK’, doing so will save your choices. You should now no longer see the channels which you have disabled from your view in this tab.
For More Details Vendor Management System Video