Cut a Region with Cmd + Double click and Undo is not available

It's difficult for any of us to assist you when you haven't told us what application you are using.

Know that some edits cannot be undone.

The first things to try are:

• Quit and restart the app.

• Check the app's settings to enable/disable undo steps.

• Shut down and restart the computer.

• Contact the app publisher for support.

Johne154 wrote:

When I cmd + double click on a region to cut it, I'm unable to undo the cut.

It says Command not available as there are no undo steps.

Is that just how it works or is there a setting to enable this keyboard shortcut to be undone?

Command C copy

Command V paste

Command X cut/copy

Command Z undo

are the common ones.

ref: Mac keyboard shortcuts

if this is some third party application involved then I would spell out the details...or say more about your specific situation.

Please read the following user tip and restate your question/problem in detail: 

     Writing an Effective Apple Support Communities Question - Apple Community

We're not clairvoyant nor can we see your Mac screen so you'll have to describe in detail what your're experiencing and what you're trying to do in what app.