Raspberry Pi foundation release CM4 a few days ago and the most exciting thing to me is that RPi also released the Compute Module 4 IO Board schematic and PCB layout files in kicad.
The product page is here: https://www.raspberrypi.org/products/compute-module-4-io-board/?resellerType=home
To open the kicad files, we need to install the Nightly builds of kicad.
If you are using Windows, check here: https://kicad-downloads.s3.cern.ch/index.html?prefix=windows/nightly/
If you are using macOS, check here: https://kicad-downloads.s3.cern.ch/index.html?prefix=osx/nightly/
Scrow to the ground, and download the latest build.
now, we open the CM4IOv5.kicad_sch
And the CM4IOv5. kicad_pcb
Also, we can open the 3D Viewer by ALT+3