This article only applies to the old designer. Not sure which designer you have? Check here.
Go to Design
From the merchant portal, choose Design from the navigation menu.
Go to the Code
Find the section for Published Design and press the Designer button.
Locate or Add the Image to Edit
Select the Edit button to edit your image.
Edit the Image
Once your image has been uploaded (or you just selected it) press the Edit button in the top right corner. A photo editor will pop up.
Make the desired edits to your photo, then press the blue Save button.