How do I re-enable the gesture where i could move windows with 3 fingers?

[audirs5]

I used to be able to put my 3 fingers on a trackpad and just move around, now I cant. I have to "click". I want to go back the old way, how do I go about that?

 

[Tommo66]

System Preferences > Accessibility > Mouse& Trackpad > Trackpad Options and check Enable Dragging and select three finger drag from the dropdown menu.