Let's say you have an existing response in Ethnio, and you're either using a screener with a scheduling question, but the respondent didn't pick the right time, or, you've been communicating directly with them via email / text and you want to move them over to a new time. To save having to ask them to fill out a screener again you can manually schedule an existing participant.
You can do that from Responses >> Select the participant >> Manually Schedule.
This will allow you to assign them to a new time, and then choose if you want them to receive a new invite email or not. If you manually confirm them for the new time, they can also receive a new details email.
This then takes you to a page where you fill in times for them, but it doesn't trigger an email to them at all.