I am happy to find this free tool to handle with my cash carefully

So in iCompta i have some summary postings and I want group them into some types.
For example some types that I will create:
- insurance color blue
- traffic costs color red
- food color green
But how could I do that? I find on the right menue "general" a option that calls "types".
When I cklick on the plus to allocate the type for the posting there happens nothing.
The typesmenue don´t create an new type so the field is lightgrey and without function.
Maybe I should do that in an other way but please help me to find the right approach.
Thanks Tommyboy