You wish to set a specific metadata field are important, searchable or editable, but are unable to find it in the Exif/IPTC list in the settings.
All metadata is imported from the media file without exception. This metadata can be viewed in the single media view under File info > Information or Additional information.
In the settings under General > Exif/IPTC settings you can configure individual metadata fields to define which fields are important and will therefore appear under Information in the single media view, which fields should be indexed for searching (searchable) and which should be editable by users.
We keep a comprehensive list of metadata that covers most of the standard fields. We regularly update this list to include new metadata items. However, it can happen that the particular field you are interested in is not in the list and will therefore not appear.
If this is the case, you can create a new metadata field. When doing so, it is important that you accurately enter the name of the metadata field that is not being shown. Click on the plus button and then on SAVE at the bottom of the page. You field will now be listed and can be configured as normal.