How to make a UMG slider control Rotation of a actor

Hi, I’m pretty new to unreal engine and am developing a VR program for the quest. I have created the UI but how can i link the slider to the rotation of an actor in my scene

You’ll need first get a reference to the actor you want to rotate, then in slider event OnValueChanged first change value range from 0 1 to 0 360 and set that as actor rotation, that will do it for 1 axis.

How to I add the actor in the the widget node editor so I can reference it?

You can use GetAllActorsOfClass, and choose one that you need, marking it with a tag.