Editor Script - Placing objects

I'm working on an editor script to place objects in Javascript. Basically works but I can't figure out how to make a brush/cursor/blue circle on the object I'm placing objects on (like Unity terrain tool for planting). I have it working with a projector but that seems a bit lame. Have Googled for hours and can't find any reference. Not even sure if it's called a brush or cursor.

Any help either script or even a link would be greatly appreciated.

Thanks

 

Can anybody at least point me to what I should be searching for?

 

Sounds like you have it solved. There's Handles that display arrows and such, or there's projectors. Do you need some different kind of functinality?

 

A projector would work basically, although it must be in the scene. I have noticed other asset packs that don't seem to use this kind of method (including unity terrain). So I was hoping to not use a projector and not have to reinvent the wheel for placing objects if it's already built in.

Thank you.