Please Change Shift+Click to Select a Unit or Hero from Group Selection

I think in the older versions when you select a group of units, you could just left click on one and it’d isolate that unit or hero from your group selection. In Retold to do this you have to shift+click. Is this really the only way or is there a setting I’m missing?

Even if it is not like this in the old version, a lot of RTS don’t require this shift click to select just a “squad” or unit or hero from a group selection.
Can we get this fixed?