You can add, remove, and manage images, videos, and documents in the “Media Library” of Catalog Bar.
For example, here is the method to add product image:
Select a category and click on “Product Image” field.
The “Media Library” page pops up
Click on “Upload File(s)” to upload the image from your PC
After uploading the image to “Media Library”, click on the image itself and click on "Done" in the “Media Library”.
Now, a new product image is added to the catalog.
On the web catalog, users can see the product image you have added to the Catalog Bar CMS.
You can follow the same process for adding video and document files.
Note: You cannot use multiple images for the single product.