From the sheet of images, cut out one image for each slide mount.Don't forget to trim off all the inside bits from bent elbows etc., Take a dk brown pen, and working from the BACK go around all your cut out images so that there is no white edge showing.
Measure your slide mount and cut out your background ¼” smaller e.g. If your slide mount is 2”square - cut your background 1 ¾” square. With your glue stick adhere each image to your pre-cut background.
Run a fine line of Weldbond or Pritt Power Glue around the edges of your image/background and adhere to the slide mount.