Individual styles can be downloaded the EndNote website
Mac OS:
Windows:
EndNote™ provides a number of terms list to make sure that the journal names in your bibliography are either the full name or abbreviation as your style requires. To set up your terms list, first make a backup of your library as described at EndNote: Moving, backing up, or transferring libraries to another computer Then, please follow the steps below. The procedure is also shown in an embedded video following the steps.
In EndNote, go to "Library > Open Term Lists > Journal Terms List".
EndNote 21/20: Generate full or abbreviated journal names Support Article
If you want to change the capitalization of the title in the reference list then you can modify this in the output style:
1. Open EndNote™ and go to Tools >Output Styles > Open Style Manager or Edit > Output Styles > Open Style Manager.
2. Locate and then double click to open the style that you use.
3. Under 'Bibliography' on the left, click on 'Title Capitalization' and on the right change the setting to your requirement.
4. Click on File > Save As to save a copy of the output style
Once this is done, please be sure to choose the edited style in Word for the changes to reflect. You may click EndNote: Changing Output Styles Within a Document for instructions on to change the style in Word.