We just sent out some DocuSigns, then realized we missed a few text fields that we typically fill in before sending. Not a huge deal, but we'd like to fix the ones that have not been viewed yet without sending them another notice. Is that possible?

You can "Correct" any envelopes. The typ eof correction of course depends on the actions already taken by Recipients. However, the Notification that gets sent with a Correction is not something the Sender can control only the Recipient(s) can control or disable certain types of Notifications. So correction is possible but you cannot stop the notifications.