Size of icons on desktop

HI,

I am using KDE 4.14.2 and I have set my 4 virtual desktops to be Default Desktops (not folders)
When I try to copy items from the kickstart menu to the desktop I get small icons (I' m a bit older and like to see things a bit larger).
How do I make the icons look bigger? I know how to make one bigger by using the handle but enlarging 20 or so per desktop is a tedious job. Also is it practically impossible to make them all the same size.
One more question: how do I place these icons in a straight line next to each other, like with folder view where you can place them on a grid.

When this is not possible, is it perhaps possible to switch the desktops to Folder View and select a different folder per desktop? This way I can enlarge them easily and place them in a straight line.Who can help with this " problem" ?

Please help.

I didn' t find the right solution from the Internet.

References:

https://forum.kde.org/viewtopic.php?f=14& t=132626
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Thanks!