The slot tools in the Sketch > Create panel let you create different types of slots as sketch geometry or construction geometry in an active sketch in Fusion 360.
Center to Center Slot 
You click to place the center of each slot arcs, then click to define the slot width or specify the diameter of the slot arcs.
Overall Slot 
You click to place the start point and end point of the slot centerline, then click to define the slot width or specify the diameter of the slot arcs.
Center Point Slot 
You click to place the slot center, place the center of the slot arc, then click to define the slot width or specify the diameter of the slot arcs.
3 Point Arc Slot 
You click to place the start point and end point of the slot center arc, place the third point of the center arc or specify the center arc radius, then click to define the slot width or specify the diameter or radius of the slot arcs.
Center Point Arc Slot 
You click to place the center point of the slot, place the start point and end point of the slot center arc, then click to define the slot width or specify the diameter or radius of the slot arc.