Choose Insert, and then More Gadgets.
In the Google Sites Editor, find the Insert menu, and open it. You will see a list of components you can embed on your site, like Tables, Images, and Links. Find the More Gadgets option, and click it. This allows you to install customizable tools such as the POWr Photo Filter to your site.
Copy and Paste
The Gadget manager will appear. Select Add Gadget by URL. Then copy and paste this exact URL into the box. Choose Add to complete.
Adjust Height and Width
Now that you’ve added your new, customizable Photo Filter Widget to your Google Sites page, you’ll probably want to adjust the size and shape of the Widget. Using the options in the pop-up, pick a height and width for your plugin. You can also choose to add a border, scrollbar, or title around your Photo Filter Widget, but we don’t recommend it. You will have more editing options through the plugin.
Set up POWr Photo Filter
Go to the live Google Sites web page and select the settings gear in the top right corner of your Photo Filter Widget.
In the POWr Editor, click Import Existing Photo Filter, find Photo Filter- and click Copy.