Ability to make your unit "unclickable" in combat

Units with big models ( especially while standing on high ground ) are often making it harder to attack an enemy standing right above them. It would be a QoL change to be able to make them semi-transparent and clickable-through. Either a button and/or hotkey should do the trick.

Sorry for my english, and in case there is already a way to resolve this problem, sorry for my ignorance.