CoqIde 8.6中Set Printing Universes命令无效，该如何解决？

Let's work through fixing this annoying mismatch between CoqIde and coqtop:

• Check CoqIde's display preferences
  CoqIde 8.6 uses separate UI settings that can override the Set Printing Universes command. Go to the Edit menu, select Preferences, and look for a "Printing" or "Display" section. There’s likely a disabled checkbox labeled something like "Show universe annotations" — enabling this should make the universe info appear alongside your type outputs.

• Re-run your type check after setting the flag
  Sometimes CoqIde doesn’t auto-refresh existing output when you toggle printing flags. After running Set Printing Universes., explicitly re-run your Check or About command for the type you’re inspecting. For example:

  Set Printing Universes.
  Check nat.
  

  This should trigger the updated output with universe annotations.

• Consider upgrading your Coq version
  Coq 8.6 is pretty old (released back in 2017), and later versions made big improvements to CoqIde’s handling of universe printing. The CPDT tutorial is likely written with newer Coq versions in mind, so upgrading to a stable recent release (like 8.15 or 8.16) will fix this issue and give you better tooling and fewer bugs overall.

• Temporary workaround: Use coqtop alongside CoqIde
  If you can’t upgrade right now, keep using coqtop to verify universe annotations while writing code in CoqIde. It’s a split workflow, but it gets the job done. Alternatively, try ProofGeneral (an Emacs-based Coq interface), which tends to align more closely with coqtop’s output behavior.

内容的提问来源于stack exchange，提问作者user9309163