For example: If that looks like HTML to you, you aren’t wrong. Once you have the schematic, you can do the same kind of thing to lay out the PCB using ... the board, a 3D render of the board ...

As long as your boards are using KiCad (or KiCad-converted ... too. Here’s another example from the PCB design above. It’s a shim for a Linux-powered Raspberry Pi that lets you program SPI ...