Yes. If you are using the 180+ ADRs because you are staying on site, it will ask for your reservation. Sign on to WDW.com first. I was able to use my DVC reservation number and went for it. It's so easy.
The only thing that was frustrating me about online (and we've used it twice before) is that if there are reservations for the time you ask, they additionally show you 1 available time slot before, 1 after. So, if you want to play around with times, you have to go back to the main page and re-enter all info. None is stored.
You can add/change restaurants (by resort or park) with the edit feature on the left, but not the timeframe. A little cumbersome.
But still easy to use....and make changes...