In the project's grid view, tap on the thumbnail for the snippet you'd like to manage. While in the detail view, tap on the icon at the upper right-hand corner of the snippet thumbnail—this will bring up a menu with several options.

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You'll have 3 options to choose from when sharing:

Replace the snippet with a different photo or video.

Gives you the option to copy the snippet into other 1SE projects.

Opens the snippet editing screen so you can make changes to your snippet.

ℹ️ Please note that if you no longer have the source video of your snippet in your Camera Roll, you'll have limited editing capabilities. For example, you won't be able to change the portion of the video you selected to create your snippet or extend its duration.

Allows you to add or change the snippet's caption.

Mark a snippet private or visible (if it's set to private).

Delete the snippet from your project.