You won't be able to dismiss this by usual means (escape or click button), but you can close it programatically based on user choices or actions.
"The paper and picture quality are great. The card was a bit smaller than I thought it would be, but it will save us from writing a lot in each card! I like how I was able to customize the color, font, etc. - I was able to stick with the theme of our Save the Dates, invitations, etc., which I also ordered from Wedding Paper Divas. I am very happy with the purchase - I will use their sister company, Tiny Prints in the future."