Please advise if there is a way to modify the note properties of 3 or 4 notes in the same location at the same time rather than one at a time.

Which properties?
For example, using the PRV you can highlight many notes and change the velocity with the same mouse action affecting all.
 

Yes, it would depend on what you're trying to accomplish.
You can highlight multiple notes and raise the velocity (as SimpleManZ eluded to).  
You can also drag the notes longer or shorter.  You can use the smart tool to mute all or move all.
Is there something specific that you feel you can't do to multiple notes?
Are you using the PRV?

Let me put the question in a better way.  In Piano roll mode and at a specific position, ie 4.01.0000, is it possible to change, let say the duration and velocity of the 2, 3 or 4 notes in that position all at the same time rather than one at a time.

I am fairly new at this. What is the prv

What you called "In Piano roll mode" is the PRV=Piano Roll View.
So in the PRV, you could click/drag several notes to highlight them, then use the smart tool to modify as needed for volume, duration, pitch etc. Another way to select individual notes is to CTL/Click them, then modify. 

If you want to apply the same change to a range of selected notes - e.g. make then all the same length or the same velocity or the same Midi channel you can easily do this by using the Event Inspector in the Toolbar.

As noted by Bristol_Jonesey the Event inspector is probably your most versatile tool for this.  Not only can you set things the same you can adjust by percentages or by "+ and -" amounts.

Hi John!
 
Looking forward to the new film?

Thank you all. Just what I needed.