If you left some mistake the you can easily edit or delete the images / articles from your panel.
Lets we understand it in very simple steps.
(Delete the image / article)
STEP - 1
Just click on "Delete" button to delete the image.
(Edit the image / article)
STEP - 2
1. click on "Edit" button.
2.Now all data of article fill in text box. Just edit it.
Finally click on "Submit" button to save the data.