We have released the April data refresh today, which includes Web of Science data up to the end of March 2021. Key feature include a new indicator in Publication Sources entity that allows you to view and export the eISSN of a source. The ISSN/eISSN search supports copy-paste functionality in all entities. We have tested successfully with up to 500 identifiers but more number should be supported. We will soon expand the copy-paste ability to all filters in the application.