I just upgraded to 18.04 from 16.04. I am using
gnome-ubuntu-desktop. After upgrading the icon size on desktop are very large.
I am unable to find my option to decrease the size in preferences. How do I decrease it?
Grid view: Change your icon view from "list" to "grid" first by clicking the button next to the hamburger menu.
This should also reduce the size of the icons in your desktop.
You can also resize icons by right clicking on each icons and select resize. Then you resize it up to a certain allowed minimum.
In case you have a wheel mouse
Open Nautilus and click on the show directory as symbols icon (middle of the button on the top-right of nautilus's window) an press Ctrl+Scroll Mouse up/down.
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