Measure the window where you would like to add your image. Choose the image you want and print it on your vellum using an inkjet printer. You will want to make sure to print where it will fit inside the window you measured. Allow the ink to dry completely on the vellum. It will be wet when you remove it from the printer.
Cut the vellum to the size of the pane of your lantern. I was able to remove the pane from my lantern and trace it with a pen. If you can’t remove it, just measure and use a ruler to make the lines on your vellum.
Cut around the lines you made with scissors so that your photo is the same size as the lantern pane.
Once you cut with scissors, it is time to secure the vellum to the glass pane. Use a very thin bead of glue around the outer edge.
Then add the vellum to the glass. Remove any excess glue. Allow to dry completely.
Once dry, add the pane back to the lantern and place an LED candle inside if you wish.