[RWP] Help With Quantizing Please?

[Indigo]

I'm learning Reaper as needs arise, and haven't needed to quantize midi 
until now.
I can't get it to work.
I'm temporarily back in version 3.78, but that is not the reason, since 
Reaper had quantizing long before in earlier versions.
I select the midi item with ctrl+shift+right arrow, go to edit/Process 
Item/quantize to grid.
I tried setting the quantization from thirty-second notes to even 1 2 
and 4 bars, click on process, and it's definitely doing nothing.
ctrl+Z undo definitely says it is undoing quantization, though there is 
no evidence to my ears that quantization has taken place.

I went to options menu where you can apparently assign the grid, and set 
it to everything from sixteenths to whole notes, no change.
I pressed alt+G to toggle grid before quantizing, no change.
By the way, alt+G doesn't say if it is toggling grid off or on.
I suspect it is just causing the grid lines to show visually along the 
time line, and is not affecting whether the grid is in place or not.
I also went to project settings and tried all 3 time base for item 
choices:, 1; time, 2; beatposition, length, measures,etcetera,  and 3; 
beat position only.
Quantization still didn't work on any of the time choices.

Can anyone provide a easy 1 2 3 baby step tutorial on what steps I 
should be doing to quantize?
Thanks,
Indigo L