An image is a type of template for a virtual machine (VM).
You can launch an instance, install the software and files you want to use, then request an image of the instance. This will save all of the changes and updates within Atmosphere. Saving instances as images saves resources. The saved image can be relaunched at any time so that it won't keep running, and using resources, when it is not being used.
After submitting the form, the Jetstream Atmosphere support staff will review and process the request. Future versions of Atmosphere will allow users to initiate the VM imaging process automatically.
Be sure to test launch any image created to validate that it behaves as expected BEFORE suspending or removing the current active instance, since only active instances can be imaged.