Ability to CHOOSE which GUEST monitors to blank on a computer with 2 or more monitors

It would be nice when I remote into a computer that has 2 or more monitors, if I could choose which displays I would like to blank.

Example:  One screen might be displaying cameras, which is fine for anyone to see, but the other screen may be displaying private business financials or payroll which is personal.  So there is a need to see the cameras, but not the other.  

Another example.  Perhaps a person is doing remote training with remote clients for a business.   The person with the training demo has 3 monitors, perhaps he only wants to share 1 monitor so the others do not see the other 2 monitors.

There are many ideas, but clients have been specifically asking for this.