Note: This method can be applied on Custom Grid and Post Based Grid
1. Create a Custom Grid or Post Based Grid.
Edit the Grid Skin.
2. Insert a new Layer into the Grid Skin.
Drag a layer into the Grid Skin and select Text/HTML as Source
3. Insert the custom HTML code below into the Text/HTML > Source
<a data-pin-do="buttonPin" href="https://www.pinterest.com/pin/create/button/?url=%post_url%&media=&description=Next%20stop%3A%20Pinterest"></a>