...
How to set up a custom message
This The custom notification message will always be the one to be shown, even if you have set up a preset message on the asset“go first”. So, in the case where you have both predefined and custom messages set up (which technically is non-sensical to have), the user will be met with the custom message, not the predefined one.
Usually, one would set up the metadata field for custom notification messages to be either a string or a note field. The way it works is that an admin or editor edits an asset’s metadata, fills out the custom notification message field, and saves. Now, users who download the asset will be met with the custom message.
...