The font used for the commands makes O look like 0 to inexperienced users. I'm sure that 0 actually has a slash through it, but when first navigating to a page, it's ambiguous. I was stuck wondering why Ctrl+Shift+0 wasn't working.
A possible work around that doesn't involve changing the font, would be to use o instead of O. That is "o" instead of "O".
Compare the html element's font to the tooltip font:


The file in question: https://github.com/microsoft/vscode-docs/blob/main/docs/getstarted/userinterface.md