Kodak Ektalite 2000 Operating Manual page 26

Operation
Removing a Slide
Rotate the tray to the slide you wish to remove. Firmly press and hold
down the select bar to eject the slide.
Adding a Slide
When the cover (or lock ring) is off, you can add a slide to any empty
slot. (See page 51.)
Replace and secure the lock ring.
66 KODAK EKTALITE Slide Projectors