Three 8th notes per beat

I’ve been looking for some time how to configure Cubase to understand not just the time signature but the beat configuration. When, for example, I want a 9/8 meter that is three 8th notes per beat, the key editor still shows two 8th notes per beat with a lone 8th note orphaned at the end of each bar. This makes a very confusing time when trying to read the key editor. Some discussion threads I’ve seen hint at this.

Now, if it were 5 beats per measure and I wanted them grouped by 2 and 3 or vice-versa, I understand that is my problem. It is an irregular meter. But 6/8 and 9/8 are regular meters; arranging the grid for beat groupings doesn’t seem unreasonable considering music history is rife with this practice.

To clarify, I don’t mean tuplets. I mean the basic meter of the music. The point of having a 9/8 meter is to be able to write music played in triplets without having to indicate triplets over every three notes.

So…is this possible in Cubase and, if so, what am I missing?

Thanks in advance,