Hi Arl, Thanks for reaching out to us!
You can achieve this – although we don’t have an import from Pinterest option, you can:
1. Click GRID COLLAGE from our START tab
2. In the Photo Basket (down the very bottom left) change the dropdown from Uploads to Web
3. Enter the URL of each image and you can then drag the image onto the collage
4. Click DONE up the top right and then SAVE up the top center to save your image to your computer
5. Upload the image to Facebook
Let us know if you have any questions about this!
Regards – The Ribbet Team