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. Then update and 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. You'll see the new POWr Photo Watermark plugin when you expand the post. You can edit POWr Photo Watermark by clicking the POWr Settings Icon in the corner.
Begin editing this Photo Watermark Plugin right in the Tumblr website:
Go to the live Tumblr web page and select the settings gear in the upper right corner of the Photo Watermark Plugin.