> Try "if RED on collision with BLACK then RED drag_and _drop".
The problem is that I wish the black platform slides, the way you say cut the drag & drop
Try to do what he told me TheDom but lost me ...
CompareY: <Les than (457) example. You can explain it again or with an example
You have to add a condition to your drag and drop event that will only apply if your object is between a certain height.
This will cause your object to drop when it isn't in between that certain height.
This however will not slide your object from left to right as it will not be dragging anymore (constantly dropping).
What you can try is to put a condition that whenever you're dragging it beyond a certain Y position, the object will stay on a certain Y level.
I've made a quick example to show you how I've done it: