Let's say you have someone who already filled out a screener with a scheduling question, but you want to email them to invite them to either click on a new URL, or pick new times since they filled out the screener. You can go to responses and check the box next to their name and then click Invite Previous Respondent.
This will not require them to answer any new questions on the screener except to pick a new time. They will receive an email asking them to pick a new time, and then will see a page like this, but keep in mind there must be a scheduling question present in your screener, although you can hide it if you don't want initial respondents to see it.
Then you can invite them from Scheduling >> Calendar.
Now make sure to customize the "Invite Previous Respondent" under Scheduling >> Emails, because that's the email they will receive.