Is there any way to reduce the space between the desktop icons? Maybe reduce the size of them.
I don’t think there’s a way to reduce the spacing, other than disable “Align to Grid” and manually positioning them.
But you can change the size. Just right-click on some free space and select “Folderview Settings” (or click on the “wrench” symbol on the plasmoid’s handle bar that appears when you move the mouse over it). Then select “Icons”, you can change the size there with a slider.