oh  and the problem with libreoffice draw  is it tends to corrupt the visio object when pasting although for the most part it works.

Hi James thanks for posting in the community! To clarify are you saying that you're attempting to copy these Visio objects embedded in PowerPoint and paste them onto a Lucidchart canvas? If so copying and pasting like this from other platforms and applications isn't explicitly supported. In this case I'd recommend using our Visio import tool to import them as editable objects in Lucidchart - for more information take a look at this Import Files from Visio article from the Lucidchart Help Center for step by step instructions. Let me know if you have additional questions!