You can use special software for graphic design (for example, Photoshop or Illustrator), where you can create your personal design. I also advise you to use ready-made mockups of postcards, for example, you can use these https://www.ls.graphics/free-mockups/postcard-mockup . Then you will need to overlay one layer on another and save. You can read more about jet on the Internet, there are many portals and blogs about it.
Kleoppa replied
260 weeks ago