Edit Column categories

Hi,

I’ve been looking for a way to add more categories in the columns. We now have the standard “From”, “Subject”, “Received”, “Account”, “Category” and so on. 

In outlook you’re able to create your own categories. What I’m looking for in particular is the ability to add a “checkbox” in the columns. Once an email is answered, you tick the “checkbox” and it’s then marked. I use this to sort my emails more easily.

Any ways to do this with eM Client?