Media Library & Canto
Media Library
WordPress Media Library is a link in your WordPress admin sidebar which is used to manage uploads (images, audio, video, and other files). The media library holds all of the forms of media. Once you click into the library, you can see images, video, audio, and documents in the same area.

Canto
To select assets from the shared Canto Library, there is a special Canto block available. After adding this block to the page, Select asset from Canto button will appear.

This button opens Canto Library, and desired asset can be selected:

Selected asset will be added to thelocal Media library and can be used anywhere on the page afterwards.