1) Select a prop by clicking on it.
2) Right click to open a menu and select Copy.
Alternatively, select the Copy icon in the video maker.
3) Right click in the scene and select Paste to duplicate the prop on the scene.
Alternatively, select the Paste icon in the video maker.
Pro-tip - use keyboard shortcuts after selecting the prop. Try Ctrl + C on Windows or Cmd + C on Mac to copy, then paste the prop with Ctrl + V on Windows or Cmd + V on Mac.