Hi Dawn!
You can definitely do this, I just tried it in my environment, but you have to put the YTD Metrics in the Rows field. I know it seems a bit odd, but it does still display and add up correctly. I've used real numbers so had to redact them, but trust that everything did add up right :) I just had to move the YTD columns to the end of the table, as they appear in front of all the months to start with.
Doing it in this way stops the metrics appearing in every month like Guillermo mentioned. I don't think it looks that nice either, and is a bit pointless when it's a YTD measure! Hope this helps.
