Apply Dynamic Media image presets applying-image-presets
Image presets enable assets to dynamically deliver images at different sizes, in different formats, or with other image properties that are generated dynamically. You can choose a preset when you export images. The preset reformats images to the specifications that your administrator has specified.
In addition, you can choose an image preset that is responsive (designated by the RESS button after you select it).
This section describes how to use image presets. Administrators can create and configure image presets.
NOTE
Smart imaging works with your existing image presets and uses intelligence