How to make desktop icons less fat on Gnome 3.16?
The icon size settings for the desktop are the same as for the icon size in Nautilus for Icon View Defaults.
For smaller or bigger sizes, use the next steps
- Right Click the desktop icon
- Select Resize Icon…
- Left Click the resize handlers at the edges of the wire frame
- Resize the icon
You can restore the original size with
- Right Click the desktop icon
- Select Restore Icon's Original Size
If that doesn't work though, you really should think about changing their diet... ;-)