After updating Gnome to 3.18 on my Debian box, all the icons became unacceptably large compared to what I had before. Is there a config file I need to edit to shrink the icon size? I tried following this guide, editing all 96px to 48px and 136px to 68px in /usr/share/gnome-shell/theme/gnome-classic.css. After a reboot, the icons are still the same.
Gnome 3.18 icon size
gnome3icons
Best Answer
Or a workaround I've found to do that:
Open (Unity/Gnome file manager) While holding CTRL, scroll with mouse scroll up/down to increase/decrease the icon sizes of the "Files" Amazingly enough this will change the size of the desktop icons as well.