All my font styles broke and became italic

Just select everything and press Cmd + i again

I tried that 😦

Hey Alex,
About the shortcut, can you confirm if the issue happens in both the browser such as Chrome, and the desktop app also?

Can you also make sure that your keyboard layout within Figma has the same language setting than your system keyboard? Here is how to check that: Select keyboard layout

If this has not helped can you try changing this back to Generic and then clearing your cache in your browser and desktop app, then refresh Figma and check if the undo command works?

You can clear the desktop app cache on a Mac in the Help menu under Troubleshooting. If you’d prefer to manually clear your cache you can:

1. Quit the Figma desktop app
2. Open Terminal.app and enter the following command: rm -rf "$HOME/Library/Application Support/Figma"
3. Try opening the desktop app again

You can clear the desktop app cache on Windows under the toggle-arrow at the right of the top toolbar under Help > Troubleshooting. If you’d prefer to manually clear your cache you can:

1. Close the Figma desktop app
2. Open the Start menu, and paste in this, followed by enter: %APPDATA%\Figma
3. In the window that opens, delete the Desktop and DesktopProfile folders if they exist
4. Launch the desktop app again

Hope this will fix it so you can undo the editing!