fallout 4 grenade hotkey?

How to Throw Grenades and Place Mines in Fallout 4

Select your favorite explosive, and hold down your melee button for a while. You should hear a clicking noise on success before throwing….2 AnswersXBOX: RB.PS4: R1.PC: Alt.Nov 14, 2015

FALLOUT 4 : Dynamic Cross-hairs, Hit-markers, Enemy Indicators, and Grenade Hotkey!