Software to write down shortcuts into text form

I am looking to quickly write down shortcuts on a paper to remind them and review them.

It would be great to be able to just press the shortcut itself and have it typed for you in text form. Example, i press CMD + O, applet writes down CMD + O. Is this possible through any mac trick or specific software?

Thanks!

You might check out Jellycuts.

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I use the snippets feature in Alfred for this.

To type ⌘ for example, I simply type a : followed by cmd.