I'm not sure if that is available out of the box, I haven't seen it if it is. But the killer feature of Obsidian is the community plugin ecosystem. I would be surprised if a plugin isn't available soon so make this happen.
This looks like Obsidian's first move away from using some dialect of markdown? The .canvas files appear to be human readable json, but certainly not as readable as markdown. I'm excited to try this out, but I hope this isn't a trend towards using proprietary formats.