When you export references from databases into your EndNote library or enter references manually, you should always check each reference record carefully and edit any incorrect fields to ensure all references are displayed in a correct output style.
Review each reference:
EndNote templates contain a lot of unused fields which can be used to add additional information for a specific task or purpose.
Examples of commonly used fields are listed below.

You can use the Notes or Research Notes fields to add information for each reference. As both fields are very similar, it is important to decide which type of information will be recorded in each field.
Consistency is key. Use the same field for the same type of information, and use the exact same words each time.

Examples of notes you could add to your references:
With EndNote you can edit multiple references at the same time. For example, you might want to add information to the notes or keywords fields of several references.
The following example shows how to add some identical text to multiple references:

Note: Be careful using Replace whole field with. Using this option will delete any existing text in the selected field in all selected references.
If you have incomplete references in your EndNote Library, for example articles without DOI numbers, you can use Find reference updates to add any available information.