Media Library + multi-resolution images: how to disable for a specific field?

System Information
  • Strapi Version: v3.6.5
  • Operating System: Linux Ubuntu 18
  • Database: MySQL
  • Node Version: v12.22.6
  • NPM Version: 6.14.15
  • Yarn Version: 1.22.5

In a Component I have a media field for images only which accepts multiple items (so image array).
I do not need the various resolutions for an image: the original is sufficient.

How do I disable the multi-res feature for a specific field when uploading images?