Go to Account Settings Edit Appearance Edit Theme.
Click on the Edit HTML link underneath Custom Theme.
Paste POWr Script
Paste this exact POWr script into your HTML file, in between the Head tags. Update, then save.
Create New Text Post
Go back to the Tumblr dashboard and add a new Text post.
Paste the Shortcode
Paste the shortcode into the post. Then save. Expand the post to see your new Map plugin. Click the POWr Settings Icon to set up POWr Map.
Begin customizing the following Map Plugin directly inside of your Tumblr site:
Go to your live Tumblr website and click the Settings Icon in the top right corner of your Map Plugin.