I am trying to convert a large Lucidchart diagram that took quite a while to Draw.io. Draw.io recommends ctr-a, ctr-c, ctr-v, but that doesn't seem to be working. Draw.io also cryptically mentions however:
draw.io supports importing the Lucidchart JSON file format. Lucidchart makes it difficult to obtain that data, so the easiest way to import is to copy and paste from editor to editor.
Has anyone ever figured out how to get the this json from Lucidchart?