It is possible to preview the participant center without having to register as a participant. Follow the steps below to do this:
  1. Go to Fundraising > select Teamraiser.
  2. Next to the TeamRaiser in question click "Edit"
  3. Click step 13. Customize Pages
  4. Under Related Actions select "Preview Participant Center"
This will open a preview of your participant center in a popup window.

Note: There will be no "Preview Participant Center" option if your TeamRaiser is using Participant Center classic.