Product categories can be edited,deleted,created that is done by Products -> product Categories.In one side add new categories and the otherside listing the already existing product categories

Adding the new product Products -> Add NewThen the top section adding the tittle and content are adding the content section.Product Category section select one category then Featured Image portion adding image.Front End Select Product Menu and select one product product listed and click one image that page contains different images that can be changed from Product -> All Product and edit one product that contains one portion product images changes
the images as your needs.