change minimap unit icon display(?) not minimap image

Weird question i know...

Lets say, i want to change the round dot that is displayed in minimap where a hero is (or the tiny little square for units).

Is this possible? it doesn't matter if it changes colours or not when selecting it in minimap options

You can change the Hero's "round dot" in the game interface menu under the setting of "Icon - Minimap Hero".

I don't think you can change units though.