Choose the location for 0 degrees rotation. By default the standard 3 O-Clock position (right most) is considered the Angle Origin. If you require the origin to be set to 0 from the Top - choose 12 0-Clock.
If anyone is unfamiliar with Clock Position, here's a handy online calculator, https://rechneronline.de/winkel/clock-position.php
Component Rotation (from Topside):
By default Counter-Clockwise is used for component rotation direction. If you require direction to be in the opposite direction, choose Clockwise.