Follow this guide when you need to restart API registry preview branch builds to apply new configuration settings.
Go to API registry Overview tab and select your preview branch build in the logs. For example,
test-rebuild-branch is the preview branch build in the following image.
Select RESTART to trigger a new preview branch build.
After the build finishes you can preview it by selecting
Back to API Registry, then the
Overview tab and selecting
Preview Docs in preview branches menu.