Just click on the 
link from the ‘Featured Image’ box and you know what next to do! 
Please note that the images inserted from Dropbox CANNOT be cropped.
Dropr – Dropbox Plugin
Adding Featured Image
Settings
- Product Type:WordPress Plugin
- Current Version:Ver 1.2.0
- Released:20/08/2015
- Last Updated:03/01/2019
- Links: