I installed Powershell 7.
The default is v5 and it remains the default
But how do you run v7?
Bring up a Command Prompt (or Powershell v5) and type "pwsh".
CMD is the most interesting . . .
Here is the original CMD window
It tuns into this
When done in Powershell it does this
OK, your will look different. I'm running the Chris Titus profile.
Remember, Powershell can run every cmd command.
You don't need to do this but if you type cmd.exe once, Powershell will act more like cmd. It will perform the commands without cmd.exe but may not display the same.