The 3 dashes icon on the top left is used to open the hamburger menu (alternatively, you can swipe from the left).
You can now adjust the angle mode anywhere using the angle mode toggle. The angle mode is RAD when on and DEG when off (the labels don't fit in the Android Lollipop themed switches so unfortunately you'll have to remember this).
The different modes of TLCalc can be switched between easily by tapping on the mode you would like to use. You can also add a short-cut to your home screen to directly access that mode by tapping on the bookmark icon.
Note: TLScript is still in development and is not intended for use although you can play around with it if you wish.
