Hide object with mouseover

For the item you are trying to hide,  first you can create a custom "state" that actually is simply a totally transparent shape.    It sounds like you'd like to change the state of this object when you mouse-over another object on the page.    In theory, this is easy in Javascript, not possible using the Advanced actions.  

If you add the following in the "On Enter, execute Javascipt"  and assuming:

1) the object you want to hide is named "hideThis"  

2) transparent state is called "transparent"  

3) the object that you are mousing into is called "theHider"

4) you want it to re-appear when the mouse goes out of the hider.

you put the following in the "On Enter, execute javascript" box:

$('#theHider').hover(  () => { cp.changeState("hideThis", "transparent") } ,  () => { cp.changeState("hideThis", "Normal") }  );

this is untested.