Change names of categories

I would like to create new categories other than the default category tabs of promotions, social, updates, forums and other. How do I do this? If this is not a function, can you make it one?

You can only enable or disable the current category names via the eM Client Settings.

If you would like to be able to customise the Category names, you can vote for that idea via the eM Client Sleekplan Share and Vote for ideas page.