The Metadata Manager is a new tool for depositing metadata without any knowledge of XML. It currently supports journal articles and grants, with additional record types planned for the future.
When to use it: Use this method if you want to register journal articles or grants one at a time interactively, including editing existing records, or if you want to upload a previously created .json template.
Image Source: https://www.crossref.org/documentation/register-maintain-records/metadata-manager/
Image Source: https://www.crossref.org/documentation/register-maintain-records/metadata-manager/ 
Image Source: https://www.crossref.org/documentation/register-maintain-records/metadata-manager/
Image Source: https://www.crossref.org/documentation/register-maintain-records/metadata-manager/