Found and lost desktop grid adjustment

I stumbled upon an old XP desktop appearance adjustment in Win7 which allowed me to set the spacing between desktop icons, both horizontal and vertical.

And ...

You could also choose the font and the font size and, most importantly, the icon size.

I was delighted. I could order my icons just the way I needed them for my busy desktop. But then my water-cooled processor water pump broke and spilled water in my tower. Hours later, I had an air cooler on the processor and all was right again.

Except ...

I could not remember how I came to that wonderful desktop grid adjustment box.

I searched for a long time but have not been able to track it down.

So now I wonder if any of you savvy experts could be kind enough to point the way?

Thank you for your kind attention