It is easier to import references to your EndNote desktop library and sync them to your EndNote Online library but both manual entry and import from databases is possible.
Click the Collect tab then New reference
Importing References
The following databases allow direct export to EndNote Web in their output options
All other databases
1. Mark selected records
2. Look for a Save or Export option in the database
3. If given options, choose full records and EndNote format e.g. .ris
4. Save the file to your Downloads folder (or somewhere you can find it)
5. In EndNote Online - click Collect - Import References
6. Select the database filter to allow your records to be imported correctly.
Note
For Multisearch use the ProQuest filter
For GoogleScholar use the EndNote Import filter
Log in to EndNote Online. Go to the Options tab and select Download Installers
Follow the instructions, and simply drag the button onto your browser's toolbar.
The toolbar button will collect one reference at a time.