How to open .cvd file using canvas X? OR how to save changes in canvas draw which can be modified using canvas X?
You cannot. Canvas X is a very old build that does not support the modern MacOS. Canvas Draw is an entirely new build that's slowly getting back all the functions in Canvas X. What do you want to do in Canvas X that you can't do in Canvas Draw?
To answer the question you also posted in the Windows side; you can Save As a PDF in Canvas Draw that you can Open or Place in Canvas X.
Thank you for your answers