When Bert says his icons "keep moving around" he doesn't mean that as he sits and looks at the computer screen, that the icons are in motion, moving from one place to another.

If you don't disable it manually, most will add a new desktop icon by default. After a few years of this, you'll find that your desktop has become a cluttered catastrophe of icons, usually not ...

Ubuntu's DING extension adds new keyboard shortcuts for desktop icon selection, including multi-select, Ctrl+Space toggle, ...