Using just the core image/file attribute type, such as a page thumbnail attribute, the image attribute will then be available to be picked with a checkbox in the image selectors.
Going beyond the core, installing a third party fileset attribute or one of the multiple files attributes makes it easier to attach many images to an item with a single attribute. All of the attribute type addons listed below are free.
Currently supported attribute types for images are:
- Core - image/file attribute
- Marketplace - Fileset attribute
- Marketplace - Multiple files attribute
- Github - Multi File Selector attribute
Or you can use a 'list' selector to list many items, then for each item list one or more image properties or attributes.
Also with these image selectors Omni Gallery will make many item and image file properties and attributes available for use in image links, names and descriptions.