You may not show the backup key to anyone.
If the backup key is leaked to a third party, you may have your assets stolen. Saving by screenshot may lead to:
- Loss of your assets in case of loss or breakage of the device
- Leakage of the backup key in case the device is stolen
For these reasons, please write the backup key on paper and store it other than in the device, or keep it more secure.
You can see the backup key again as long as you remember the passcode.
Follow the steps in the link below.
About Backup Key