In many apps, you can tap Share or to choose how to share your information. The choices vary depending on the app you’re using. Additional options may appear if you’ve downloaded apps with sharing options. For more information, see App extensions.
Share from the Files app. You can send a copy of any document in View documents. Touch and hold the document, tap Share, then choose an option for sending the document (for example, Message, Mail, and so on).
Organize your sharing options. Tap the More button, then touch and drag to move items to new positions.