Edit Appearance Edit Theme
In your Tumblr dashboard, open your Account Settings. Select Edit Appearance and click Edit Theme.
Go to Edit HTML.
Paste the Script
Paste this script into the Tumblr HTML file. It's always best to paste it between the Head tags. Update, then save.
Create a new Text post in the Tumblr dashboard.
Paste this shortcode into the post. Expand the post to see your new Subscription Payment plugin. Click the POWr Settings Icon to set up POWr Subscription Payment.
Start to customize the Subscription Payment Plugin:
Visit your live Tumblr website and click the gear icon in the top right corner of the Subscription Payment Plugin.