The funtion hexl-insert-hex-char in Hexl mode only allows you to replace a byte. How can I insert a new byte between two existing bytes?

  • I don't think hexl-mode allows that. But you can C-c C-c out of it into the raw binary file and insert using any of the usual methods, then go back to hexl-mode to verify that you haven't screwed anything up. – NickD Jun 26 at 15:15

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