What this video covers
How to choose how many days before each renewal charge your customers get the upcoming order email: the Reminder email step of a subscription option, the dates in How it works, which subscribers the change reaches, and the default timing on the Upcoming Order email.
In short
Open your plan, click Edit on a subscription option and choose Reminder email. Pick Use email settings to follow the Upcoming Order email, or 1 to 30 days before the charge for this option only.
How it works shows when each reminder goes out, for someone who signs up today. Click Done, then save the plan.
It moves the reminder, not the charge. New subscriptions get the timing; current subscribers keep theirs. To change them, select them on the Subscriptions page and choose Set email reminder days (Bulk Automation access is required).
The default timing is under Upcoming Orders Settings on the Upcoming Order email: in the app menu, open More (click View more first if you don't see it), then Notification Settings, and click Edit on Upcoming Order. A change there also reaches new subscriptions only.
The step is greyed out for Prepaid, one time options, which have no renewal charge to remind about.