Hi @george r thank you for posting in the community! You can export your diagrams using the following methods depending on if you are using Lucidspark or Lucidchart. 

Lucidspark (PDF PNG JPEG or SVG.):
Navigate to the More menu next to your board name choose “Export” and select your desired file format.

For more details please review the Export and print your Lucidspark board article from the help center.

Lucidchart (PDF PNG JPEG SVG VDX/VSDX (Visio) file or shape data CSV):

Navigate to File > Export and select your desired file format.

For more details please review the Export and print your Lucidchart board article from the help center.

Hope this helps! Please feel free to let us know if you have any trouble exporting your diagram or if you have any additional questions :)