If you want to create a Public Link directly using the Web-client, here's a short guide.
What you will need to do:
1. Open your browser and login with your credentials
2. Navigate to the folder/or file you want to send with a Public Link
3. When you click/or right click at the file an option menu will show/pop up and you can select to create a Public Link
4. A pop-up will show and you can add a personal message, enable password protection and add an expiry date - press save when you are done.
5. The URL-link will now be shown and ready to be sent.