You may wish to have a TeamRaiser participation type that can only be used for a certain period of time or that you want to wait until a certain time to let it be usable by registrants. To change this:
  1. Fundraising > TeamRaiser > "Edit" next to the TeamRaiser in question
  2. Go to step 6, "Manage Participation Types" and then click "Edit" next to the participation type
  3. Go to step b, "Select Type Options"
  4. Next to number 3, "Availability", choose "Inactive (not yet available for registrants to select)". If at any point you would like to make this participation type usable again, choose the option for "Active"
Note: This will not prevent any existing participants from fundraising.