2D indicators: materials placed on ..?

So as the title suggests I’m trying to find out how to properly implement 2D indicators for displaying way points for example.

What I want is the player to enter into a “command mode” where they can click the mouse in the world space and have something move there or spawn there.

But I need indicators to give feedback to the player while they are actively playing.

I know that these can visually be achieved by using texture masks within a material (say for a circle or cross or something) but then I would need to project that material onto whatever surface the player has clicked on. This is where I’m confused, do I spawn an invisible sheet at x,y,z location with the material applied to the top face?

As always, thanks for the help!

I have the material made, just need to figure out how to spawn this as a decal actor onto the area where I want this feedback to be generated.

Anyone able to point me in the right direction?