You can easily copy or paste an object in Ludus with it :
⌘ + C or
Ctrl + C
⌘ + V or
Ctrl + V
Copy/paste an element within a same slide
Copy an element from a slide and paste in another slide
Duplicate your elements in same slide
by using ⌘ + D or Ctrl +D.
Those shortcuts are universal and used by most of softwares.
Access our list of keyboard shortcuts to practice 🙂