Moreover, how do you delete a picture you sent on Snapchat?
In the chat tab, tap and hold your finger down on the message you sent and want to delete. Tap Delete. Tap the purple Delete button to confirm that you want it deleted. Keep in mind that your friends in the chat will be able to see that you deleted something.
Also Know, how do you delete an unopened picture on Snapchat 2019? Press Snapchat app icon and hold it until "X" shows up at the left and click "X" to delete Snapchat.
Thereof, how do you delete a Snapchat before someone sees it?
You Can Now Delete Snapchat Messages Before They're Read
To delete a message, users can press and hold on the message/photo/video they want to get rid of. A pop-up will then appear asking if they'd like to delete it.
How do you stop someone from seeing a snap you sent?
There is NO way you can unsent snaps which you have send. Even contradict to what other answer said, deleting your account won't even prevent other user from seeing it. If you delete your account, other person won't be able to reply your snap but they can definitely see your snap.