Creating additional calculated relative dates

In a previous Transformer version I used to be able to click on date dimension and go to graphic display, drag the line down from a box and let go to create a new relative date and choose from a dozen or so choices. I want to create a selection for First day of the Month, so when I am in Power Play I can click on that choice and only the data for the first day of all months will appear.

Does that have to be done in Framework Manager now?

What version are you using?

The versions i have seen and used can do what you describe?