docs not building to PDF

[Chris Johns]

On 10/10/2022 9:22 pm, Frank Kühndel wrote:
> images/filesystem/tftpfs_usage.png:
> https://share.embedded-brains.de/index.php/s/fQ4WrLrqmBjcbwC
I have a greyed out image I cannot clearly see?

> images/filesystem/ftpfs_usage.svg:
> https://share.embedded-brains.de/index.php/s/xk7kArkm6mbjcn2
> 
> The SVG file is the source for the PNG. Both files must be placed in the
> images/filesystem folder.

How is the SVG file created and how can it be edited?

Chris