To add the cover images for files
Click on the I in the circle against the file and select replace thumbnail
Select from company images or upload your own
Your cover for the file will appear in the apps as shown below
Uploaded images are available in the company images
To remove images uploaded which are stored in the company images, you will need to use the previous web access as this as not yet been developed in the latest web access.
Access the previous version of web access by going to platform configuration > configuration bundles >use v4 web app