Background flashing yellow on Drag

Hi there

When I drag an item around, as I drag onto an item the background displays white, when off, it goes yellow.

I’m sure there is a reason for it, but the overall effect as you drag an item around is for the screen (div area) to constantly keep flashing between yellow and white, which doesn’t look terribly good.

Can this effect be switched off at all?

Many thanks (and thanks for prompt assistance on previous posts)

Background switched to yellow when you drag item not over another item, but other free space of component ( drop on root level )
You can

a) Remove color changes
    dhtmlxtree.css , selectionBox css class - just erase this class definition


b) Disable drop-on-free space