My app offers a monthly subscription right now, and we are in the process of adding annual subscriptions as well. The user should be able to upgrade/downgrade their subscription, and it looks like this is possible to do within the app, using Google's In-App Billing API as explained here.
Buried at the bottom of this page, however (click on "Change the frequency of your subscription"), it seems that we can offer the ability to change subscription frequency from the Play Store, in the "Manage Subscriptions" section. I cannot find anything that explains how this happens, so my question is - how can we take advantage of this? Will this option automatically show up if we programmatically implement upgrading/downgrading within the app? Is there anything else we need to do to allow the user to upgrade/downgrade directly from the Play Store?