How do I add or what to do to add an image to the buyer's review on my gig's review?

[puppynopey]

Hi fiverr community! I was wondering how do i add or what do i tell to my buyers to add an image to their review? (Like the image below).

[akib0079]

when you deliver a project please add an image that will show as a review image afterward

[shafkat_ppc]

Deliver the work with images or screenshots. It will appear there like this.