iMessage – iWallpaper Maker : Custom theme Wallpapers ( for home screen, lock screen, kakao, whatsapp, Messenger) Review

I would like to know how to make the background go to my iMessages please because I can't figure it out. Thank you!
Review by WLE0211 on iWallpaper Maker : Custom theme Wallpapers ( for home screen, lock screen, kakao, whatsapp, Messenger).