Share a score
You can share an individual score with people who are not members of your collection by creating a share link.
Open the score
From a work, open the score you want to share.
Create a share link
Use the share action to generate a public link. Optionally protect it with a password.
Send the link
Copy the link and send it to your recipient. Anyone with the link (and password, if set) can view the score.
For more on link options and security, see Public share links.