Why should it be implemented:
For many times, I want to select a specific amount of units, like 8 villagers. Currently it can’t be done very easily in this game.
They are billions
Select any amount of units, like 10 villagers. Hold “Alt” (Or any remappable key) and click the unit icon in the bottom left window to decrease the number of selected units by 1. Therefore, if I want to select 8 villagers and I accidently select 10, all I need to do is to hold “Alt” and click the villager icon twice.