Having used OS X E Capitan for a few weeks, something I noticed is that Apple has disabled the three finger drag feature on MacBooks and Mac desktops when using a Magic Trackpad. This has also been moved to a different location within the settings app, which is a bit strange.
The first thing you need to do it go to Settings on your Mac. In the past, this could be altered by going to System Preferences > Trackpad. Now, Apple have moved it to System Preferences > Accessibility. Anyway, below is the step by step.
Step 1
![Go to system Preferences from the in the top left of the screen](https://www.theinterface.uk/wp-content/uploads/2015/11/Screen-Shot-2015-11-03-at-18.35.57.png)
Step 2
![Click Accessibility within the System Preferences app](https://www.theinterface.uk/wp-content/uploads/2015/11/Screen-Shot-2015-11-03-at-18.36.13.png)
Step 3
![Once in the Accessibility pane, click the "Trackpad Options..." button](https://www.theinterface.uk/wp-content/uploads/2015/11/Screen-Shot-2015-11-03-at-18.36.25.png)
Step 4
![Tick the "Enable Dragging" box then open the drop down and click on "three finger drag"](https://www.theinterface.uk/wp-content/uploads/2015/11/Screen-Shot-2015-11-03-at-18.36.50.png)
This is actually a really useful feature, it allows you to easily move windows in and out of view when using a MacBook. Thats all you need to do to reenable Three finger drag, hope this helps everyone.