3. In regedit, navigate to the location below.
4. To Change the Desktop Icon "Horizontal" Spacing
A) In the right pane of WindowMetrics, double click/tap on IconSpacing to modify it.
B) Type in a value between -480 to -2730, and click/tap on OK.
NOTE: The default setting is -1125. The minimum amount of space is -480, and the maximum is -2730.
6. When finished, close regedit.
7. Sign out and in of your user account to apply.