Some useful editing features that EndNote provides include adding notes/labels to a reference record, setting citation styles, and removing duplicates.
Use the right-column 'Reference' tab's 'Edit' feature to edit any field in a reference’s record. You can also double click a reference to open the record in full screen. You will be prompted to save the changes to the record when you either close the record or click another reference in the Reference list column.
EndNote has thousands of citation styles from which to choose. In order to easily switch among the styles that you prefer, first select them from the Style Manager.
Additional citation styles can be downloaded from the EndNote Output Styles website.
Importing references from multiple databases can result in having several duplicate references in your EndNote Library. Luckily, EndNote has a tool that identifies the duplicates and allows you to choose which to keep and which to discard from your library.
For a full discussion of EndNote topics and tips, visit the Clarivate research guide located online: https://proquest.libguides.com/endnote