Copy a slide from one slider to another
Copy the currently edited slide
Right click on the canvas of the slide you want to copy. A menu will open. Click on "Copy slide".
Create a new empty slide, right click on its canvas and select "Paste slide." The layers and slide background will be inserted.
Copy a slide from the slider settings
You can use the bulk actions to copy a slide to a new slider.
After clicking on the Copy button, sleect the slider where you cant to copy your slide: